Why does the nervous system resemble a system of long branching wires from clusters
1. Why does the nervous system resemble a system of long branching wires from clusters of nerve tissue in the form of nodes or a brain? 2. What structure of the brain is responsible for the intelligence (mind) of the animal? 3. Why is the circulatory system closely related to the circulatory system? 4. Why do not too large animals have an external skeleton? 5. How many circles of blood circulation do terrestrial vertebrates have? 6. What harmful substances does the excretory system free the body from? 7. Who are vertebrates and who are invertebrates? 8. What sense organs act remotely (at a distance from the stimulus), which – only in direct contact with the stimulus?
1. Neurons are cells of the nervous system that have long processes – axons and dendrites, they are like wires coming to every organ of our body and connecting all parts of the body into one whole. The brain and spinal cord are the central nervous system, from which a dense network of nerves extends to each organ and muscle for coordinated work and control. Information from the sense organs is sent in the form of impulses through neurons to the parts of the brain and spinal cord, where the response is processed and issued.
2. The hemispheres of the brain are responsible for intelligence.
3. The circulatory system consists of the heart and blood vessels through which blood flows. Circulation is the circulation of blood through the circulatory system.
4. The exoskeleton (external skeleton) provides body protection and rigidity, most often found in crustaceans in the form of a chitinous cover and needles in echinoderms, it is shed during molting and growth of the animal. It is found in small animals, since in order for it to fulfill its role it must be strong enough and at the same time not very heavy. For large animals, meeting these conditions is problematic.
5. Terrestrial vertebrates have 2 circles of blood circulation.
6. Urea, uric acid, creatine, acetone, ammonia, bile pigments.
7. Vertebrates include fish, amphibians, reptiles, birds and mammals. All other classes of animals belong to invertebrates.
8. The distant sense organs include sight, smell and hearing, contact sense of touch and taste.
