Answer:
A large vein that carries blood to the heart from other areas of the body. The vena cava has two parts: the superior vena cava and the inferior vena cava. The superior vena cava carries blood from the head, neck, arms, and chest.
Answer:
The first man to witness a live cell under a microscope was Anton van Leeuwenhoek, who in 1674 described the algae Spirogyra
Explanation:
Answer: The action cytoskeleton structure is dynamic.
Explanation: Actin cytoskeleton is a dynamic structure necessary for cell and tissue organization, including the maintenance of epithelial barriers. The epithelial barriers are necessary to maintain barriers, the disruption of the epithelial barrier coincides with alterations of the actin cytoskeleton in several disease states. Primarily these disruptions affect the paracellular space, that is normally regulated by tight junctions. The actin cytoskeleton is a usual target of bacterial virulence factors. Bacteria secrete and inject toxins and effectors to hijack the host cell machinery, in order to manipulate the action cytoskeleton, which interferes with host-cell pathways and with a number of actin binding proteins.
Answer:
The endoplasmic reticulum (ER) is the main site for lipid synthesis.
