Embryonic Adaptations for Terrestrial Life

Lungs for breathing air, limbs for mobility, a digestive system for processing terrestrial food, and specialized skin for protection.

Gills for underwater breathing and a tail for swimming.

It is the clear, pear-shaped central region where the embryo is found.

<p>It is an elongated mass of cells in the center of Area Pellucida, and it is in the process of regression.</p> Signup and view all the answers

<p>Cell migration plays a crucial role in shaping the embryo and forming various structures, such as the neural plate.</p> Signup and view all the answers

<p>It is a critical structure that gives rise to the nervous system, including the brain and spinal cord.</p> Signup and view all the answers

<p>The epidermis is the layers of darkly stained cells surrounding the embryo, serving as a protective barrier.</p> Signup and view all the answers

<p>The optic cup is a C-shaped organ composed of the retina and lens, located dorsolateral to the pharynx.</p> Signup and view all the answers

<p>The pharynx is a large chamber of the foregut that forms the gills, located on the ventral region of the embryo.</p> Signup and view all the answers

<p>The thyroid gland is a short diverticulum of the pharynx, located lateral to the pharynx.</p> Signup and view all the answers

<p>The external nares are circular openings of the nasal passage to the exterior, located beneath the anterior region of the head, while the internal nares are inner openings of the nasal passage, seen as a dot mediolateral to the external nares.</p> Signup and view all the answers

<p>Cell migration plays a crucial role in the formation of embryonic structures, allowing cells to move to specific locations and differentiate into specialized tissues.</p> Signup and view all the answers

<p>lateral to the intestine</p> Signup and view all the answers

<p>It provides a clear tubular structure between the spinal cord and the myotomes</p> Signup and view all the answers

<p>It is a dagger-shaped extension of the tail that appears translucent beneath the ectoderm</p> Signup and view all the answers

<p>The stomach is a saccular organ that is continuous with the intestine</p> Signup and view all the answers

<p>It is a dense tubular structure dorsolateral to the posterior intestine</p> Signup and view all the answers

<p>It is an enlarged posterior region of the intestine</p> Signup and view all the answers