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The testes of a fetal pig develop in the internal reproductive system. The reproductive system which has two scrotal sacs if the pig is old enough.
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What do all 5 classes of vertebrae have in common?
# A notochord in the embryonic form # A vertabra column # double opening to alimentary canal. # bilateral symetry # mesoderm # three coelomic cavities # gills, in the embryonic form # chevron musculature # dorsal nerve cord
What is the hollow ball stage of cleavage?
The developmental stage in which the embryonic cells form a hollow sphere (actually its full of fluid) is called a blastula.
What are the reproductive organs for a male frog?
Vasa Efferentia:connect the rete testis with the initial section of the epididymis.Cloacal: opening in the back of the frog that allows passage of sperms, eggs, and waste products.Bidder's Canal:Collecting Tubules:Urinogenital Duct:
Are annelids bilateral?
No, they are protostomes. Protostomes form their mouth first in their embryonic development (it also means ´mouth first´). Deuterostomes form their anus first, and their name means ´mouth second´. Deuterostomes include echinoderms such as starfish and sea urchins, and us chordates including the vertebrates. Everything else, save for sponges and jellyfish, is a protostome.
What are metamphosis?
A transformation, as by magic or sorcery.A marked change in appearance, character, condition, or function.Biology. A change in the form and often habits of an animal during normal development after the embryonic stage. Metamorphosis includes, in insects, the transformation of a maggot into an adult fly and a caterpillar into a butterfly and, in amphibians, the changing of a tadpole into a frog.Pathology. A usually degenerative change in the structure of a particular body tissue.
During embryonic development of animals tissue layers form This process of embryonic tissue development is called?
germination
Which are the two body cavities that form during embryonic development?
Coelom and Peritoneal cavity
The three primary germ layers that form during the embryonic development of mollusks are?
The endoderm, mesoderm, and ectoderm
Congenital septal defects are holes that form in the septum during the embryonic development of the heart---resulting in the abnormal flow of blood from?
the left side of the heart to the right
During embryonic development cells specialize to form what?
a group of specialized cells forms tissue, a group of tissue forms an organ
How do tissues form your heart?
During embryonic development, part of the mesoderm breaks away and starts to form the heart. The embryonic stem cells differentiate primarily into myocardial cells, with the endoderm forming the endocardium and valves and the ectoderm forming the pericardium and pericardial sac. The exact steps aren't well known - embryology has more questions than answers for human development at this time.
What structures is the first sign of a human body forming during the embryonic period?
An embryo is what an organism is in its first stage of development after conception. The first tissues to form are the ectoderm, mesoderm, and endoderm.
What does recapitulate mean?
* summarize briefly; "Let's recapitulate the main ideas" * repeat stages of evolutionary development during the embryonic phase of life * reprise: repeat an earlier theme of a composition wordnet.princeton.edu/perl/webwn * to summarize or repeat in concise form; to repeat the evolutionary stages of an organism during its embryonic development en.wiktionary.org/wiki/recapitulate
What is metomorphesis?
A change in the form and often habits of an animal during normal development after the embryonic stage. Metamorphosis includes, in insects, the transformation of a maggot into an adult fly and a caterpillar into a butterfly and, in amphibians, the changing of a tadpole into a frog.
An embryo has many cells which change to become specialized?
During embryonic development cells specialize to form tissues. Mitotic cell division is very important during body growth. After this time muscle tissue becomes amniotic.
When do eyes and ears start to form?
Eyes, ears, nose and mouth form during the Embryonic period during the fourth week as the head begins to take shape. Also in the fourth week are the first heartbeats.
Is testes plural?
Testes is the plural form of testis referring to a pair of male reproductive organs.
