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The Skeletal System
The Skeletal System

... • Cells are called osteocytes • Surrounded by fibers and cemented by hard background • The structure forms around an osteonic canal, with blood vessels and nerves in the center ...
Bilateral symmetry - Cal State LA
Bilateral symmetry - Cal State LA

... ectoderm + endoderm ...
Chapter 1 Powerpoint Review
Chapter 1 Powerpoint Review

... • Organ systems are NOT described as which of these statements? A. They function together to ensure wellness of the organism B. They are groups of organs with a common function. C. They can share organs with other systems. D. They act independently of each other. ...
Embryonic vascular development: immunohistochemical
Embryonic vascular development: immunohistochemical

... utilizing the nuclear differences between quail and chick or mouse embryonic cells have revealed that the endothelium of limb buds (Jotereau & LeDouarin, 1978; Wilson, 1983) and kidney (Ekblom et al. 1982) clearly arises by invasive sprout penetration. The segregation and directed migration of presu ...
Test #2
Test #2

... 16. The mucosa of the stomach demonstrates folds termed rugae. These folds increase the surface area of the stomach for absorption and secretion. In addition, these folds disappear when the stomach is stretched as it is filled. ...
disorders of the nervous system
disorders of the nervous system

... Each nerve cell consists of a central portion containing the nucleus, known as the cell body, and one or more structures referred to as axons and dendrites. The dendrites are rather short extensions of the cell body and are involved in the reception of stimuli. The axon, by contrast, is usually a si ...
body systems1
body systems1

... gametes, are made by the male and female reproductive systems. • Male gametes are called sperm. • Female gametes are called ova, or eggs. • A sperm joins with an egg in a reproductive process called fertilization. ...
What is Blood?
What is Blood?

... How does this help the release of oxygen? The size of a red blood cell forces it to slow down as it passes through a capillary. The surface of the red blood cell is exposed to the surface of the capillary and so gas exchange will definitely happen. 19 of 40 ...
Heart
Heart

... Which chambers of the heart have deoxygenated blood passing through? Which have oxygenated blood? Which blood vessels are attached to the right atrium? Left atrium? Right ventricle? Left ventricle? Describe the pericardial layers that surround the heart, including the types of tissues that make them ...
File
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... mediastinum divides the thoracic cavity into two pleural cavities. Note that this transverse or cross-sectional view is oriented as though the observer were standing at the subject’s feet and looking toward the subject’s head. This is the standard presentation for clinical images, and unless otherwi ...
Loose connective tissue
Loose connective tissue

... Dense connective tissue found in tendons which connect muscles to bone and ligament which connect bone to bone. When collagen bundles are present without apparent orientation, called dense irregular connective tissue. When oriented in parallel arrays, called dense regular connective tissue. Elastic ...
Name: Block: ___________D ate: Kingdom Animalia, Phylum
Name: Block: ___________D ate: Kingdom Animalia, Phylum

... d. Anatomy of the hydra – be able to locate and give functions of these parts: tentacles, cnidocytes, mouth, ectoderm, endoderm, gastrovascular cavity e. Two body forms: polyp and medusa f. Four (4) classes of cnidarians: Hydrozoans, Scyphozoans, Anthozoans, Cubozoans. Be able to distinguish the fou ...
Unit 4 NERVOUS AND REPRODUCTION SYSTEM
Unit 4 NERVOUS AND REPRODUCTION SYSTEM

... __________ is the name for the time when the body begins to develop and change as you move from child to adult. During puberty, the body will ________ faster than at any other time in your ________ , except for when you were a baby. By this time reproductive organs are mature. For boys, __________ t ...
Skin
Skin

... – Keratinized stratified squamous epithelium consisting of four distinct cell types and four/five distinct layers • Cells: – Keratinocytes • Majority of epidermal cells, produce a fibrous protein – keratin – protection • Arise in the deepest part of the epidermis (stratum basale) – undergoes continu ...
1 The greater omentum is derived from which of the following
1 The greater omentum is derived from which of the following

... reserve follicles that contain primary oocytes (arrested in prophase of first meiotic division) surrounded by a single layer of flattened follicular cells. Primary follicles (choice C), the next stage, are slightly larger and contain a central oocyte surrounded by one or several cuboidal follicular ...
powerpoint lecture
powerpoint lecture

... lobe (primary visual cortex) The visual fields of the two eyes overlap considerably. Note that fibers from the lateral portion of each retinal field do not cross at the optic chiasma. ...
Basic Anatomy and Physiology of the Eye
Basic Anatomy and Physiology of the Eye

... • Bruch’s membrane – membrane on the external surface of the retinal pigment epithelium (RPE). It consists of the basement membrane of RPE cells and choriocapillaris. Between the two layers of basement membrane are the elastic and collagenous layers. Small localised thickenings of Bruch’s membrane ( ...
Chapter 21 ()
Chapter 21 ()

... c. adventitia tracheal cartilages: hyaline cartilage, C-shaped, open posteriorly ligaments connect cartilages together trachealis m. (smooth m.) connects ends of rings ...
Peritoneum and abdominal cavity
Peritoneum and abdominal cavity

... cavity during embryonic development much like the lungs in the pleural cavity. Retroperitoneal organs are ones, which are posterior to the peritoneal cavity (outside the peritoneal cavity). These organs have parietal peritoneum on their anterior surfaces. Development of gut and peritoneal cavity Emb ...
Multicellular Organisms Part 2 Reproduction
Multicellular Organisms Part 2 Reproduction

... 2. Complete the sentence by choosing the correct pairing in each bracket: ...
Normal placentae of domestic mammals
Normal placentae of domestic mammals

... and is lost in the lochia, usually by day 12 postpartum (PP). Reepithelialization occurs in about 21 days PP. Because the outer part of the caruncle is lost anyway, it can be sampled without damage to the future reproductive capacity of the cow. Such sampling is recommended when there is no placenta ...
Development
Development

... fuses with egg plasma membrane Important changes in the egg surface block entrance to any additional sperm In the sea urchin, an electrical potential rapidly spreads across the membrane Other animals create an osmotic gradient from enzyme reactions ...
Chapter 4 - Bloodhounds Incorporated
Chapter 4 - Bloodhounds Incorporated

... Glycolipids in extracellular space. Stratum granulosum Typically five layers of flattened cells, organelles deteriorating; cytoplasm full of lamellar granules (release lipids) and keratohyaline granules. Stratum spinosum ...
COPYRIGHTED MATERIAL
COPYRIGHTED MATERIAL

... a steady rhythm. Unlike skeletal and cardiac muscles, smooth muscle does not contain visible striations. The cells contain one centrally located nucleus and appear spindle shaped. The role of the smooth muscle is to squeeze substances through organs, such as the stomach, via alternating contraction ...
Position in Animal Kingdom
Position in Animal Kingdom

... Most have tentacles, which are extensible  projections for food capture.  Radiates are the simplest animals with nerve  cells; there is no central nervous system.  Radiates are the simplest animals with sense  organs: statocysts and ocelli.  Locomotion is by muscular contraction or ciliary  comb pla ...
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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.
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