Animal Reproduction

mother's uterus

cleavage

human chorionic gonadotropin (hCG)

<p>trophoblast</p> Signup and view all the answers

<p>transport nutrients, respiratory gases, and wastes between the foetus and the mother</p> Signup and view all the answers

<p>diffusion, active transport, and selective absorption</p> Signup and view all the answers

<p>progesterone</p> Signup and view all the answers

<p>the embryo develops into an embryo and the heart begins to beat</p> Signup and view all the answers

<p>Hormone levels stabilize as hCG secretion declines and the placenta takes over the production of progesterone</p> Signup and view all the answers

<p>hCG maintains the secretion of progesterone and oestrogens by the corpus luteum through the first few months of pregnancy.</p> Signup and view all the answers

<p>The trophoblast grows outwards and mingles with the endometrium, eventually helping form the placenta.</p> Signup and view all the answers

<p>Materials are exchanged by diffusion, active transport, and selective absorption.</p> Signup and view all the answers

<p>It is called embryonic development.</p> Signup and view all the answers

<p>During its first 2-4 weeks of development.</p> Signup and view all the answers

<p>The placenta.</p> Signup and view all the answers

<p>Progesterone maintains the pregnancy.</p> Signup and view all the answers

<p>The placenta transports nutrients, respiratory gases, and wastes between the embryo or foetus and the mother.</p> Signup and view all the answers

<p>The process is called cleavage.</p> Signup and view all the answers