Endoskeleton is the internal support of the structure of an organism. an exoskeleton is the external support
3, 2, 4, 1
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Answer:
Cranial sutures are fibrous joints. Their function is to join the bones of the skull. Sutures are important for cranial growth. Once, the sutures completely fuse braincase does not grow further. Each suture fuse at a particular age.
A startle reflex (a), digestion (c), breathing (d) and heart pumping (e) are responses of the ANS, while arm/leg movement (b) is a response of the SNS. They are major divisions of the PNS.
The peripheral nervous system (PNS) serves to connect the central nervous system to different organs, limbs, and skin.
The PNS can be divided into Somatic Nervous System (SNS) and Autonomic Nervous System (ANS).
The Somatic Nervous System is responsible for controlling the voluntary movements of the body.
The Somatic Nervous System is responsible for regulating the involuntary movements (reflexes) of the body.
Learn more about the peripheral nervous system here:
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