It represents a cold front
Answer:
Central nervous system includes brain and spinal cord. Peripheral nervous system includes autonomic nervous system and somatic nervous system.
Explanation:
Nervous system consists of electrically excitable cell called neurons and collection of nerves that transmit information in the body.
Nervous system is mainly divided into two parts - PNS (peripheral nervous system) and Central nervous system (CNS) . The CNS of the body consists of spinal cord and brain that regulates and coordinates all the functions of the body.
PNS consist of cranial and spinal nerves. This system is divided into Autonomic nervous system ( controls involuntary actions of body) and somatic nervous system ( control the voluntary actions of the body).
Answer:
Flatworms are small, literally flat worms, which 'breathe' through diffusion across the outer membrane (Figure 2). The flat shape of these organisms increases the surface area for diffusion, ensuring that each cell within the body is close to the outer membrane surface and has access to oxygen.
Explanation:
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non-metals gain electron and metals lose electrons,
<span>Iron is a metal, so when it reacts it loses an electron becomes a
cation and form ionic bonds. Hydrogen is a non-metal, it gains an electron when
reacting and forms covalent bonds or ionic bonds.</span>
