_______________ Clusters of Galaxies Contain Closely Spaced Galaxies and Often

question 55

Short Answer

_______________ clusters of galaxies contain closely spaced galaxies and often contain giant elliptical galaxies and a hot intergalactic medium.

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Definitions:

Arterioles

Small branches of arteries leading into capillaries, responsible for controlling blood flow and pressure.

Phagocytic White Blood Cells

White blood cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.

White Blood Cell

Leukocyte; a blood cell with a role in housekeeping and defense. Lymphocytes are a special category of white blood cells that carry out adaptive immune responses.

Antigen-Presenting Cell

Immune cells that process and present antigens to T-cells, initiating an immune response by showing them what to attack.