Nervous tissue. Nervous tissue or nerve tissue is the main tissue component of the two parts of the nervous system; the brain and spinal cord of the central nervous system (CNS), and the branching peripheral nerves of the peripheral nervous system (PNS), which regulates and controls bodily functions and activity.
Transmission. Mosquitoes carry the parasite that causes heartworm disease from animal to animal. The life cycle of a heartworm begins when a mosquito bites an infected animal carrying heartworm microfilariae in its blood.If that mosquito bites another cat or dog, it transmits the larvae to that animal.The larvae mature into adult worms in the heart and lungs of the host animal.he life cycle of a heartworm begins when a mosquito bites an infected animal carrying heartworm microfilariae in its blood. If that mosquito bites another cat or dog, it transmits the larvae to that animal. The larvae mature into adult worms in the heart and lungs of the host animal.
1 Heartworms are worms that live in the right side of the heart of dogs and cats. 2  Heartworms are carried by mosquitos and the mosquitos transfer the baby heartworms from one dog to another dog or cat when it bites them. 3  The worms can be 6-18 inches long and resemble a thin spaghetti noodle. Your dogâs adult heartworms should now be all killed with the completion of Heartworm Treatment Part 1. 2  Heartworm Treatment Part 2 will now kill the baby heartworms called Microfilaria, which live and circulate in the bloodstream.