Crest (equipment) – Heraldic markings on an arrow used for identification or design
blood vessels dilate, swelling occurs, phagocytes ingest foreign bacteria or viruses.
Answer:
There are <em><u>four types of neuroglia</u></em> found within the central nervous system:
<u>Astrocytes</u> :
It maintains the blood brain barrier and preserve the chemical environment by recycling ions and neurotransmitters.
<u>Oligodendrocytes</u> :
The myelinate axons in the central nervous system and provide an overall structural framework.
<u>Ependymal cells</u> :
The line ventricles (brain) and central canal (spine) and are involved in the production of cerebrospinal fluid.
<u>Microglia</u> :
It removes cell debris, wastes and pathogens via phagocytosis.
Answer:
The capillaries will connect to larger blood vessels, called veins, which bring the oxygenated blood from the lungs to the heart.
Explanation:
The alveoli are surrounded by tiny blood vessels, called capillaries. The alveoli and capillaries both have very thin walls, which allow the oxygen to pass from the alveoli to the blood
