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a fluid-filled sac that cushions and protects a developing embryo and fetus in the uterus
erect, feet forward, arms at side with palms facing forward, head facing forward
(of quadrupeds) situated in or directed toward the part of the body from which the tail arises
the digestion process in which enzymes are used to break foods into their smaller chemical buiding blocks
a muscular cavity at the end of the large intestine through which digestive wastes, urine, and eggs or sperm leave the body
a pouch in many birds and some lower animals that resembles a stomach for storage and preliminary maceration of food
having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center
the part of the large intestine that descends from the transverse colon to the sigmoid colon
animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes
an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
the inner germ layer that develops into the lining of the digestive and respiratory systems
an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal
the process in which a gastrula develops from a blastula by the inward migration of cells
an enzyme secreted in the digestive tract that catalyzes the breakdown of fats into individual fatty acids that can be absorbed into the bloodstream
large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity
the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue
a fully differentiated structural and functional unit in an animal that is specialized for some particular function
The stage of human development during which the organs are formed. Organogenesis begins after gastrulation and is completed by the eight week of gestation.
a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera
the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus
a term denoting the pleural and peritoneal serous membranes or the cavities they line
a structure that forms during the early stages of development and is the structure that will establish bilateral symmetry, determine the site of gastrulation and initiate germ layer formation
any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis
three pairs of exocrine glands in the mouth that secrete saliva; the parotid, submandibular (submaxillary), and sublingual glands
sodium bicarbonate (NaHCO3)
chemical compound released by the pancreas into the small intestine which neutralizes the acidity of the chyme
the cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart
a part of an organism consisting of an aggregate of cells having a similar structure and function
the part of the large intestine that extends across the abdominal cavity and joins the ascending to the descending colon
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