Nervous System:
* Brain
* Spinal cord
* Peripheral nerves
* Sensory organs (eyes, ears, nose)
Skin and its derivatives:
* Epidermis
* Hair
* Nails
* Sweat glands
* Sebaceous glands
Other:
* Enamel of teeth
* Pituitary gland
* Adrenal medulla
* Mammary glands
Here's how it works:
* Formation: The ectoderm forms from the outer layer of the blastula, a hollow ball of cells that develops from the fertilized egg.
* Differentiation: As the embryo develops, the ectoderm undergoes a process called differentiation, where cells specialize into different types.
* Induction: The ectoderm's development is influenced by signals from the underlying mesoderm, a process known as induction.
Key features of the ectoderm:
* It gives rise to the nervous system and the outer layer of skin, reflecting its role as the outermost layer of the embryo.
* It has a crucial role in sensory perception, allowing the organism to interact with its environment.
* It plays a significant part in regulating body temperature and protecting the body from external threats.
Understanding the ectoderm is crucial for comprehending embryonic development and the formation of key structures in the human body.
