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Role of Crosstalk Between Phosphatidylinositol 3
Role of Crosstalk Between Phosphatidylinositol 3

... venous endothelial cells but not both.10 Investigations in the zebrafish have made seminal contributions in defining the molecular pathways required for the acquisition of the arterial cell fate during embryogenesis.11 This pathway involves many of the signaling components known to play important ro ...
The Respiratory System Chapter 22
The Respiratory System Chapter 22

... • Lobar branches into tertiary (segmental) bronchi – Segmental divides into bronchioles that branch repeatedly – Smallest bronchioles branch into the terminal bronchioles (contain Clara cells) Copyright 2012, John Wiley & Sons, Inc. ...
1 Female Pelvis Uterus, Cervix, and Vagina Ashley Dobos Lynn Ta
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...  The uterine wall consists of three layers: the serosa or perimetrium, the myometrium, and the endometrium (Hagen-Ansert, p. 861, 2/2/1).  The serosa is the thin membrane that covers the myometrium and forms the outer layer of the uterus (Curry-Tempkin, p. 259, 1/2/1).  The next layer is the myom ...
The Cranial Cavity
The Cranial Cavity

... lucid interval is a temporary improvement in a patient's condition after a traumatic brain injury, after which the condition deteriorates It occurs after the patient is knocked out by the initial concussive force of the trauma, then lapses into unconsciousness again after recovery when bleeding caus ...
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... 2- Lateral accessory nasal cartilage 3-Medial accessory nasal cartilage ...
Embryology GastrointesInal System
Embryology GastrointesInal System

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Biology: Concepts and Connections, 6e (Campbell)
Biology: Concepts and Connections, 6e (Campbell)

... A) it diffuses from a region of higher partial pressure to a region of lower partial pressure . ‫انه ينتشر من منطقة أعلى من الضغط الجزئي لهذه المنطقة من انخفاض الضغط الجزئي‬ B) it diffuses from a region of lower partial pressure to a region of higher partial pressure. C) it descends down an osmotic ...
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... flows only toward the heart. This transport system begins in microscopic blind-ended lymphatic capillaries (Figure 20.1a). These capillaries weave between the tissue cells and blood capillaries in the loose connective tissues of the body. Lymphatic ...
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... Originate from the facial artery on the front of the face Superior labial gives an alar branch supplies the region around the naris and a septal branch supplies anterior regions of the nasal septum. ...
The Nasal Cavity
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... (ii) The gill-clefts are a series of five vertical "lits on each side infront of and slightly above the pectoral fins. Pass a seeker through the gill. clefts into the mouth and note that they open obliquely backwards into the giU.pouches and pharynx. ...
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Chapter 4
Chapter 4

...  Many epithelial cells have microvilli on their exposed surfaces. These are abundant where absorption and secretion take place (digestive and urinary tract).  Cilia are also found on some epithelium cells. They line the respiratory tract to move mucus. Copyright © 2004 Pearson Education, Inc., pub ...
ANSC 2401 Lab Manual
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... Description: Not a true stratified tissue. The nuclei are at different levels and all cells are attached to the basement membrane, but not all reach the surface. Location: Line larger excretory ducts of many large glands, epididymis, male urethra, and auditory (Eustachian) tubes. The ciliated variet ...
Biology Demystified (2003)
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... This book is for people who want to get acquainted with the concepts of basic biology without taking a formal course. It can serve as a supplemental text in a classroom, tutored, or home-schooling environment. It should also be useful for career changers who need to refresh their knowledge of the su ...
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...  . At its lower end (base) are the nares (nostrils).  The sides of the nose meet in the midline anteriorly to form the ...
l0: fibers from the contralateral pontine nuclei, and the inferior
l0: fibers from the contralateral pontine nuclei, and the inferior

... needed for carrying out movements and also ...
Anatomy of the female reproductive system
Anatomy of the female reproductive system

... genitalia. its long axis is almost parallel with that of the lower part of the sacrum. the anterior wall of the vagina is 1.5-2cm shorter than the posterior wall. vaginal fornix the circular cul-de-sac formed around the cervix 4 regions: the anterior fornix, the posterior fornix and 2 lateral fornic ...
Anatomy of the female reproductive system
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... genitalia. its long axis is almost parallel with that of the lower part of the sacrum. the anterior wall of the vagina is 1.5-2cm shorter than the posterior wall. vaginal fornix the circular cul-de-sac formed around the cervix 4 regions: the anterior fornix, the posterior fornix and 2 lateral fornic ...
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... medial and lateral nasal prominences, the nasal placodes lie in the floor of depressions called the nasal pits • By the end of 6th week, nasal pits deepen and form nasal sacs • Each nasal sac grows dorsocaudally, ventral to the developing brain ...
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Nasal cavity and Paranasal sinuses

... o Facial a Superior labial & lateral nasal branches of facial ...
1. During an intramural baseball game a player is hit in the side of
1. During an intramural baseball game a player is hit in the side of

... The middle cranial fossa is the part of the skull that supports the temporal lobes of the brain. It is made of the greater wings of the sphenoid and squamous part of the temporal bones laterally and the petrous part of the temporal bones posteriorly. See Netter Plate 6 and 7 for a better picture of ...
Wahl B - Behaviour and Ecology at Nottingham
Wahl B - Behaviour and Ecology at Nottingham

... All tracheae that persist have a matrix of embryonic cells, and are in immediate connection with one another, as I have already mentioned. This connection is produced from the lateral longitudinal trunks. Strangely enough, however, the dorsal imaginal discs of the prothorax which are going to form t ...
Abdominal and peritoneal cavities
Abdominal and peritoneal cavities

... i. formation of the lesser peritoneal sac (i) intercellular clefts appear in mesogastrum (ii) clefts then coalesce to form lesser peritoneal sac or omental bursa ii. as the stomach rotates on its two axes and the duodenum is displaced to the right, the peritoneal cavity related to these structures b ...
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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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