Extra Embryonic Membranes
... projecting folds of somatopleure called amniotic folds. Two types of amniotic folds develop. They are named according to their location. They are the amniotic head fold, and the amniotic tail fold. First of all, the amniotic tail fold appears. It grows over the embryo dorsally and then grows forward ...
... projecting folds of somatopleure called amniotic folds. Two types of amniotic folds develop. They are named according to their location. They are the amniotic head fold, and the amniotic tail fold. First of all, the amniotic tail fold appears. It grows over the embryo dorsally and then grows forward ...
25.2 Animal Body Plans and Evolution
... • The are of an acoelomate’s body wall and gut is completely filled with tissues • Some invertebrate groups have a pseudocoelom, which is only partially lined with mesoderm • This false coelom is filled with liquid that can act like a skeleton and provide support ...
... • The are of an acoelomate’s body wall and gut is completely filled with tissues • Some invertebrate groups have a pseudocoelom, which is only partially lined with mesoderm • This false coelom is filled with liquid that can act like a skeleton and provide support ...
Mrs - St. Aidan School
... smoke contains many chemical that cause cancer. Tumors and growths take away space in the lungs that are used for gas exchange. Atherosclerosis Some chemicals in tobacco irritate the walls of the blood vessels and contribute to the buildup of fatty material on the vessel walls. This causes atheroscl ...
... smoke contains many chemical that cause cancer. Tumors and growths take away space in the lungs that are used for gas exchange. Atherosclerosis Some chemicals in tobacco irritate the walls of the blood vessels and contribute to the buildup of fatty material on the vessel walls. This causes atheroscl ...
Chapter 5
... more than others • Important in surgery – If incision parallel to lines there is less gapping, faster healing, less scar tissue ...
... more than others • Important in surgery – If incision parallel to lines there is less gapping, faster healing, less scar tissue ...
Skeletal part 2
... Tissue level – a group of cells performing a common function Organ level – a discrete structure made up of more than one ...
... Tissue level – a group of cells performing a common function Organ level – a discrete structure made up of more than one ...
cells - Sewanhaka Central High School District
... 14. Muscles of glands that carry out a response are called • Effectors 15. How does an impulse travel through a synapse? • The terminal branches release neurotransmitters into the synapse that carry the impulse across to next neuron. ...
... 14. Muscles of glands that carry out a response are called • Effectors 15. How does an impulse travel through a synapse? • The terminal branches release neurotransmitters into the synapse that carry the impulse across to next neuron. ...
Organs from the mesoderm
... represented by ,1 paired vessel in the dorso-pharyngeal region. Opposite the hyoid arch each branch of the dorsal aorta divides into a dorsal and into a ventral braneh. The dorsal branches meet each other behind the infundibulum, while the ...
... represented by ,1 paired vessel in the dorso-pharyngeal region. Opposite the hyoid arch each branch of the dorsal aorta divides into a dorsal and into a ventral braneh. The dorsal branches meet each other behind the infundibulum, while the ...
2. Coelenterates
... an intermediate layer, the mesoglia. The intermediate layer contains cells and jelly like substances. ...
... an intermediate layer, the mesoglia. The intermediate layer contains cells and jelly like substances. ...
Cardiovascular System
... 4. The endocrine system consists of skin, hair, nails and their underlying tissue. 5. The lymphatic system returns leaked fluids to blood vessels. ...
... 4. The endocrine system consists of skin, hair, nails and their underlying tissue. 5. The lymphatic system returns leaked fluids to blood vessels. ...
UNIT 11 INVERTEBRATES READING: Chapter 27 Introduction of
... c. Cell divisions produce a hollow ball of cells called BLASTULA d. Cells on blastula move inward forming slight depression called a BLASTOPORE. e. Further infolding forms cup shaped embryo called a GASTRULA. 2. During GASTRULATION either 2 or 3 germ layers form a. GERM LAYER - layer of cells in dev ...
... c. Cell divisions produce a hollow ball of cells called BLASTULA d. Cells on blastula move inward forming slight depression called a BLASTOPORE. e. Further infolding forms cup shaped embryo called a GASTRULA. 2. During GASTRULATION either 2 or 3 germ layers form a. GERM LAYER - layer of cells in dev ...
Unit 8 Test Review – Structure of Living Things Integumentary
... What is the difference between an accessory organ and a digestive tract organ? Accessory organ – food DOES NOT pass through these organs, the organ still helps the digestive process Digestive tract – food DOES pass through these organs ...
... What is the difference between an accessory organ and a digestive tract organ? Accessory organ – food DOES NOT pass through these organs, the organ still helps the digestive process Digestive tract – food DOES pass through these organs ...
Lab Worksheet 15
... 1. The anterior end of a sperm head, called the ________________ , contains enzymes that aid the penetration of an egg cell at the time of fertilization. 2. The secretion of the seminal vesicles is rich in the monosaccharide called ________________. 3. The descent of the testes is aided by a fibro-m ...
... 1. The anterior end of a sperm head, called the ________________ , contains enzymes that aid the penetration of an egg cell at the time of fertilization. 2. The secretion of the seminal vesicles is rich in the monosaccharide called ________________. 3. The descent of the testes is aided by a fibro-m ...
function - mselder
... • All similar letters get coloured the same colour • E.g. This handout shows individual epithelial cells, a small group of epithelial cells, and epithelial tissue. They all get coloured the same colour ...
... • All similar letters get coloured the same colour • E.g. This handout shows individual epithelial cells, a small group of epithelial cells, and epithelial tissue. They all get coloured the same colour ...
Cells - 2011sec1lss
... together to carry out one or more functions • Organs are covered by epithelial tissues for protection ...
... together to carry out one or more functions • Organs are covered by epithelial tissues for protection ...
APII Test 3 Guided Study
... 5. How are lymphatic capillaries and blood capillaries similar in their permeability and what they are permeable to? How are they different? 6. Where are T cells and B cells found? Produced? Where do they become immunocompetent? 7. How is lymph part of the digestive system? 8. How is the spleen of c ...
... 5. How are lymphatic capillaries and blood capillaries similar in their permeability and what they are permeable to? How are they different? 6. Where are T cells and B cells found? Produced? Where do they become immunocompetent? 7. How is lymph part of the digestive system? 8. How is the spleen of c ...
pregnancy - Holy Family Catholic Regional Division No. 37
... Skeleton, muscles gonads, kidneys, circulatory system 3. Endoderm ...
... Skeleton, muscles gonads, kidneys, circulatory system 3. Endoderm ...
Level Notes- Human Body Systems Part 2 The Excretory
... •Human reproduction takes place as ___________________________ by sexual intercourse. •During this process, the ______________ of the male is inserted into the female's ________ until the male ejaculates semen, which contains sperm, into the female's vagina. ...
... •Human reproduction takes place as ___________________________ by sexual intercourse. •During this process, the ______________ of the male is inserted into the female's ________ until the male ejaculates semen, which contains sperm, into the female's vagina. ...
Blood and Immunity
... How Can We Avoid Diseases? •In the United States, babies and small children are usually given a series of vaccines, which protect them from many infectious diseases. • A vaccine is an injection of a weakened or mild form of a pathogen. People may also receive vaccines against certain diseases later ...
... How Can We Avoid Diseases? •In the United States, babies and small children are usually given a series of vaccines, which protect them from many infectious diseases. • A vaccine is an injection of a weakened or mild form of a pathogen. People may also receive vaccines against certain diseases later ...
Cells_and_Tissues_in_Health_and_Disease
... • Highly complex structure of entire body evolves from a single cell, fertilized ovum → multiplies, differentiates, and is organized to form organs and organ systems • Fertilized ovum differentiates into: – Trophoblast: peripheral group of cells; form placenta and other structures to support and nou ...
... • Highly complex structure of entire body evolves from a single cell, fertilized ovum → multiplies, differentiates, and is organized to form organs and organ systems • Fertilized ovum differentiates into: – Trophoblast: peripheral group of cells; form placenta and other structures to support and nou ...
Ultimate AP BIOLOGY REVIE - Page County Public Schools
... macromolecules sent to the Golgi to be modified by the addition of sugars and other molecules to form glycoproteins – products form vesicles Mitochondria: powerhouse—ATP is made here Lysosome: Digestion center Nucleus: Control center, contains DNA (genetic material) Vacuole: Storage (Plants have a l ...
... macromolecules sent to the Golgi to be modified by the addition of sugars and other molecules to form glycoproteins – products form vesicles Mitochondria: powerhouse—ATP is made here Lysosome: Digestion center Nucleus: Control center, contains DNA (genetic material) Vacuole: Storage (Plants have a l ...
Ultimate AP BIOLOGY REVIE
... macromolecules sent to the Golgi to be modified by the addition of sugars and other molecules to form glycoproteins – products form vesicles Mitochondria: powerhouse—ATP is made here Lysosome: Digestion center Nucleus: Control center, contains DNA (genetic material) Vacuole: Storage (Plants have a l ...
... macromolecules sent to the Golgi to be modified by the addition of sugars and other molecules to form glycoproteins – products form vesicles Mitochondria: powerhouse—ATP is made here Lysosome: Digestion center Nucleus: Control center, contains DNA (genetic material) Vacuole: Storage (Plants have a l ...
Human Systems and Transport Across the
... The immune system uses many cellular features, such as proteins and carbohydrates, to identify foreign invaders and protect our bodies from harm. Many of the functions that occur within the human body are a result of some form of transportation or communication. Communication is the backbone of the ...
... The immune system uses many cellular features, such as proteins and carbohydrates, to identify foreign invaders and protect our bodies from harm. Many of the functions that occur within the human body are a result of some form of transportation or communication. Communication is the backbone of the ...
Kingdom Animalia Notes
... • The blastula INVAGINATES (folds inward at one point) • Called Gastrulation • The opening is called the blastopore • The center is the primitive gut or Archenteron ...
... • The blastula INVAGINATES (folds inward at one point) • Called Gastrulation • The opening is called the blastopore • The center is the primitive gut or Archenteron ...
Chapter 28b
... myoepithelial cells spindle-shaped muscle cells that help propel the milk towards the nipple ...
... myoepithelial cells spindle-shaped muscle cells that help propel the milk towards the nipple ...
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.