Specialized Plant and Animal Cells
... embryos created by in vitro fertilization. The process occurs when the egg is fertilized under laboratory conditions. Scientists are also working on getting cells from embryos produced by therapeutic cloning, in which the nucleus of a skin cell, for example, is inserted into an egg whose nucleus has ...
... embryos created by in vitro fertilization. The process occurs when the egg is fertilized under laboratory conditions. Scientists are also working on getting cells from embryos produced by therapeutic cloning, in which the nucleus of a skin cell, for example, is inserted into an egg whose nucleus has ...
HIGH YIELD EMBRYOLOGY 2012
... – arise from splitting of a single zygote – secreted by syncytiotrophoblast – secreted by corpus luteum for five months, then by placenta; contraceptive “pill” and RU-486 are anti-progesterones – process where the epiblast gives rise to mesoderm, endoderm and ectoderm – derives from both endoderm an ...
... – arise from splitting of a single zygote – secreted by syncytiotrophoblast – secreted by corpus luteum for five months, then by placenta; contraceptive “pill” and RU-486 are anti-progesterones – process where the epiblast gives rise to mesoderm, endoderm and ectoderm – derives from both endoderm an ...
ANATOMY OF THE EAR
... fibers pass from the modiolus through the IAM to the base of the brain. VIII Nerve is comprised of 30,000 nerve fibers from the cochlea + 20,000 from the vestibular and travel through the IAM to the brain stem. ...
... fibers pass from the modiolus through the IAM to the base of the brain. VIII Nerve is comprised of 30,000 nerve fibers from the cochlea + 20,000 from the vestibular and travel through the IAM to the brain stem. ...
chapter_outline1_5
... Explain the functions of the cell nucleus and discuss the nature and importance of the genetic code. Describe the processes of cellular diffusion and osmosis, and explain their role in physiological systems. Describe carrier-mediated transport and vesicular transport mechanisms used by cells to faci ...
... Explain the functions of the cell nucleus and discuss the nature and importance of the genetic code. Describe the processes of cellular diffusion and osmosis, and explain their role in physiological systems. Describe carrier-mediated transport and vesicular transport mechanisms used by cells to faci ...
Aud & Equil
... Pathway of Sound • Sound waves travel toward tympanic membrane, which vibrates • Auditory ossicles conduct the vibration into the inner ear – Tensor tympani and stapedius muscles contract to reduce the amount of movement when loud sounds arrive • Movement at the oval window applies pressure to the ...
... Pathway of Sound • Sound waves travel toward tympanic membrane, which vibrates • Auditory ossicles conduct the vibration into the inner ear – Tensor tympani and stapedius muscles contract to reduce the amount of movement when loud sounds arrive • Movement at the oval window applies pressure to the ...
Functional Anatomy of the Respiratory System Respiration
... microscopic air sacs (alveoli) of the lungs • cartilage line bronchial tree (like trachea), but as branching gets smaller smooth muscle becomes more prominent • primary bronchi secondary bronchi bronchioles alveolar ducts alveolar sacs alveoli • alveoli - simple squamous epithelial cells through whi ...
... microscopic air sacs (alveoli) of the lungs • cartilage line bronchial tree (like trachea), but as branching gets smaller smooth muscle becomes more prominent • primary bronchi secondary bronchi bronchioles alveolar ducts alveolar sacs alveoli • alveoli - simple squamous epithelial cells through whi ...
The Integumentary System
... To function in protection, the epidermis must rely on its ability to create & repair itself following an injury. New cells must be made at the same rate that dead cells flake off. Cells push off from the stratum basale into each upper layer until they die. Regeneration time for a cell is about ...
... To function in protection, the epidermis must rely on its ability to create & repair itself following an injury. New cells must be made at the same rate that dead cells flake off. Cells push off from the stratum basale into each upper layer until they die. Regeneration time for a cell is about ...
2010
... SECTION - I (40 Marks) (Attempt all questions from this Section) Question 1. (a) Name the following : (i) The type of cell division which occurs in the cells of the reproductive organs. (ii) A plant with sunken stomata. (iii) A foreign body that induces the formation of antibodies in the body. (iv) ...
... SECTION - I (40 Marks) (Attempt all questions from this Section) Question 1. (a) Name the following : (i) The type of cell division which occurs in the cells of the reproductive organs. (ii) A plant with sunken stomata. (iii) A foreign body that induces the formation of antibodies in the body. (iv) ...
Ch 17 spec senses - Le Mars Community Schools
... • The basic receptors of the inner ear are hair cells, which provide information about the direction and strength of mechanical stimuli. • The anterior, posterior, and lateral semicircular ducts are continuous with the utricle. Each duct contains an ampulla with a gelatinous cupula and associated se ...
... • The basic receptors of the inner ear are hair cells, which provide information about the direction and strength of mechanical stimuli. • The anterior, posterior, and lateral semicircular ducts are continuous with the utricle. Each duct contains an ampulla with a gelatinous cupula and associated se ...
The Embryology of Patella1
... upon the segmentation cavity and finally nearly obliterate it. PI. I, Fig. 15, shows a surface view of these four cells, while PL I, Fig. 16, is a section through an embryo of the same stage. An optical section of the embryo at the end of segmentation shows that these cells are wedge-shaped, whereas ...
... upon the segmentation cavity and finally nearly obliterate it. PI. I, Fig. 15, shows a surface view of these four cells, while PL I, Fig. 16, is a section through an embryo of the same stage. An optical section of the embryo at the end of segmentation shows that these cells are wedge-shaped, whereas ...
7.Development of mid..
... Midgut derivatives are supplied by the superior mesenteric artery The midgut loop is suspended from the dorsal abdominal wall by an elongated mesentery As the midgut elongates, it forms a ventral Ushaped loop of gut, the midgut loop It projects into the remains of the extraembryonic coelom in the pr ...
... Midgut derivatives are supplied by the superior mesenteric artery The midgut loop is suspended from the dorsal abdominal wall by an elongated mesentery As the midgut elongates, it forms a ventral Ushaped loop of gut, the midgut loop It projects into the remains of the extraembryonic coelom in the pr ...
Reptile Starts with
... 1. The _P_ __ __ __ __ __ __ __ __ _C_ __ __ __ __ __ __ __ __ __ __ carries low oxygen blood to the lungs and brings high oxygen blood back to the heart. 2. The __ __ __ __ __ __ __ is the membrane that surrounds all the other membranes in an amniotic egg. 3. The _A_ __ __ __ __ __ __ are small air ...
... 1. The _P_ __ __ __ __ __ __ __ __ _C_ __ __ __ __ __ __ __ __ __ __ carries low oxygen blood to the lungs and brings high oxygen blood back to the heart. 2. The __ __ __ __ __ __ __ is the membrane that surrounds all the other membranes in an amniotic egg. 3. The _A_ __ __ __ __ __ __ are small air ...
Chapter-23
... Most animals show bilateral symmetry Bilateral animals have tissues, organs, and organ systems All adult tissues arise from two or three simple layers that form in early embryos ...
... Most animals show bilateral symmetry Bilateral animals have tissues, organs, and organ systems All adult tissues arise from two or three simple layers that form in early embryos ...
Are You Smarter Than a 5th Grader?
... All cells are produced from other cells. All living things, except bacteria, are Return composed of cells. ...
... All cells are produced from other cells. All living things, except bacteria, are Return composed of cells. ...
ANATOMY OF THE STOMACH AND DUODENUM
... lumen following fusion of the limiting membrane of the granule with the luminal membrane. Once in the lumen, pepsinogens are converted to pepsin. A variety of endocrine, or enteroendocrine, cells are scattered among the cells of the oxyntic glands. These cells vary in location, being either open or ...
... lumen following fusion of the limiting membrane of the granule with the luminal membrane. Once in the lumen, pepsinogens are converted to pepsin. A variety of endocrine, or enteroendocrine, cells are scattered among the cells of the oxyntic glands. These cells vary in location, being either open or ...
Gas exchange File
... – A series of chemical reactions which happen in all living cells. – Food is broken down to release energy, usually by combining it with oxygen. ...
... – A series of chemical reactions which happen in all living cells. – Food is broken down to release energy, usually by combining it with oxygen. ...
Special Senses
... Cataracts—when lens becomes hard and opaque, our vision becomes hazy and distorted Glaucoma—can cause blindness due to increasing pressure within the eye ...
... Cataracts—when lens becomes hard and opaque, our vision becomes hazy and distorted Glaucoma—can cause blindness due to increasing pressure within the eye ...
Lecture Notes
... relax and contract, the heart can do this without any direct stimulus from the nervous system. (Chemoreceptors in the carotid and aortic bodies monitor blood O2, CO2, and pH. Baroreceptors in the carotid sinus and aortic arch respond to increases in blood pressure.) The cardiac muscle cells in the h ...
... relax and contract, the heart can do this without any direct stimulus from the nervous system. (Chemoreceptors in the carotid and aortic bodies monitor blood O2, CO2, and pH. Baroreceptors in the carotid sinus and aortic arch respond to increases in blood pressure.) The cardiac muscle cells in the h ...
THE HEART
... it pumps blood all throughout the body, allowing other organs to function properly. The blood delivers oxygen and nutrients to the brain, muscles, bones and organs. ...
... it pumps blood all throughout the body, allowing other organs to function properly. The blood delivers oxygen and nutrients to the brain, muscles, bones and organs. ...
THE RESPIRATORY SYSTEM
... Within these specialized structures oxygen and carbon dioxide are exchanged between air and blood. Each alveoli wall usually lies between two neighbouring alveoli and is called an inter-alveolar septum. An alveolar septum consists of two thin squamous epithelial layers between which lie capill ...
... Within these specialized structures oxygen and carbon dioxide are exchanged between air and blood. Each alveoli wall usually lies between two neighbouring alveoli and is called an inter-alveolar septum. An alveolar septum consists of two thin squamous epithelial layers between which lie capill ...
L2-DEVELOPMENTOF FEMALE GENITAL SYSTEM
... They Cross ventral to the mesonephric ducts & approach each other in the median plane and fuse to form the Y shaped Uterovaginal Primordial. (which opens into the dorsal wall of the ...
... They Cross ventral to the mesonephric ducts & approach each other in the median plane and fuse to form the Y shaped Uterovaginal Primordial. (which opens into the dorsal wall of the ...
K CHAPTER 2: BODY TISSUES AND MEMBRANES At the end of
... study of tissues. 1.1. Embryonic tissue Approximately 13 or 14 days after fertilization, the cells that give rise to the new individual, called embryonic stem cells form a slightly elongated disk consisting of two layers called the ectoderm and the endoderm. Cells of ectoderm then migrate between th ...
... study of tissues. 1.1. Embryonic tissue Approximately 13 or 14 days after fertilization, the cells that give rise to the new individual, called embryonic stem cells form a slightly elongated disk consisting of two layers called the ectoderm and the endoderm. Cells of ectoderm then migrate between th ...
Human embryogenesis
Human embryogenesis is the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, human development entails growth from a one celled zygote to an adult human being. Fertilisation occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form a single cell called a zygote and the germinal stage of prenatal development commences. Embryogenesis covers the first eight weeks of development and at the beginning of the ninth week the embryo is termed a fetus.Human embryology is the study of this development during the first eight weeks after fertilisation. The normal period of gestation (pregnancy) is nine months or 38 weeks.The germinal stage, refers to the time from fertilization, through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days.During this stage, the zygote, which is defined as an embryo because it contains a full complement of genetic material, begins to divide, in a process called cleavage. A blastocyst is then formed and implanted in the uterus. Embryogenesis continues with the next stage of gastrulation when the three germ layers of the embryo form in a process called histogenesis, and the processes of neurulation and organogenesis follow. The embryo is referred to as a fetus in the later stages of prenatal development, usually taken to be at the beginning of the ninth week. In comparison to the embryo, the fetus has more recognizable external features, and a more complete set of developing organs. The entire process of embryogenesis involves coordinated spatial and temporal changes in gene expression, cell growth and cellular differentiation. A nearly identical process occurs in other species, especially among chordates.