Animal Form and Function: Development

mes (67)in DTube • 2 days ago

In this video I go over a quick overview of animal development, which starts from the formation of the zygote through the fusion of a sperm and egg cell during fertilization. The zygote then rapidly divides and forms a ball of similar cells called a blastula. Follows next is gastrulation, in which the blastula gets converted into the three germ layers: endoderm, mesoderm, and ectoderm. These three germ layers then form the internal organs.

The endoderm forms the lungs, thyroid, and pancreas.
The mesoderm helps form the cardiac muscles, skeletal muscles, smooth muscles, red blood cells, and tissues within the kidneys.
The ectoderm produces tissues within epidermis (outermost layer of skin), neurons within the brain, and melanocytes (producing melanin or pigment producing cells).

#science #biology #development #animals #GermLayers

Timestamps:

Animal Development begins with the zygote (fusion of sperm and egg during fertilization) and then forms a blastula: 0:00
Organogenesis is the formation of internal organs via cell differentiation: 1:49
Diagram of Endoderm, Mesoderm, and Ectoderm germ layers and the organs they develop into: 3:33
Cross-section of human skin: 5:06

Full video below: