Question
Name the organs derived from:
a) Dorsal mesoderm
b) Lateral plate mesoderm
a) Organs Derived from Dorsal Mesoderm: The dorsal mesoderm gives rise to a variety of structures in the developing embryo. Some of the major organs and structures derived from the dorsal mesoderm include:
Vertebrae and Ribs: The vertebral column (backbone) and ribs that form the skeletal structure of the vertebral column are derived from the dorsal mesoderm. These structures provide protection to the spinal cord and support the body.
Dermis of the Skin: The dermal layer of the skin, which contains connective tissues, sweat glands, and blood vessels, originates from the dorsal mesoderm. It plays a crucial role in skin structure and function.
Dorsal Aorta: The dorsal aorta, a major blood vessel, develops from the dorsal mesoderm. It gives ___ _________ _________ __ _________ __________ ________ ___________ _____________ __________.
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How does right subclavian develop in mammals?
Briefly write the functions of the following hormones secreted in mammals.
a) Adrenocoricotropic hormone
b) Parathormone
c) Aldosterone
d) Testosterone
e) Progesterone
What is a signal transduction pathway? Write out its steps in the order they would occur in a target cell.
Indicate the following changes that occur during metamorphosis in amphibians either as progressive or regressive or remodeling:
a) The development of middle ear in connection with the pharyngeal pouch.
b) The change in the shape of the mouth and the shortening and reduction of the cloacal tube.
c) Disappearance of lateral line organs of skin and reduction of blood vessels.
d) The differentiation of brain.
e) The changes in the portal system and the changes in the vascular system to supply blood to the lungs.
Write one difference between somatic and visceral arteries.
Name the organs derived from:
a) Dorsal mesoderm
b) Lateral plate mesoderm
What is the major modification that occurs in reptilian aortic arches?
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