Endoplasmic Reticulem or ER for an abbreviation = (abbr)
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Cells use a variety of transport mechanisms to deliver molecules within and outside the cell. This includes processes like endocytosis, exocytosis, diffusion, and active transport. These mechanisms ensure that essential molecules and signals are properly transported to maintain cell function.
Ribosomes are used to transport materials within the cell.
Vesicles are also used to carry material out of the cell and to bring materials into the cell.
Endoplasmic Reticulum (ER)
The spleen is a structure that is not involved in the production or delivery of gametes. It is part of the lymphatic system and plays a role in filtering blood, storing red blood cells, and helping the immune system fight infections.
Oxygen and nutrients are delivered to cells in the body through the circulatory system. Oxygen is carried by red blood cells in the blood, while nutrients are transported through the bloodstream to reach cells throughout the body. This delivery process is essential for cell function and overall health.
The respiratory system obtains oxygen from the air and delivers it to the circulatory system. The circulatory system then transports oxygen and nutrients throughout the body via the blood vessels. The digestive system processes nutrients from food, which are then absorbed into the bloodstream by the circulatory system for delivery to cells.
Dendritic cells are a type of immune cell that play a key role in activating the immune system by capturing, processing, and presenting antigens to other immune cells. They act as messengers between the innate and adaptive immune systems, helping to initiate an immune response against invaders such as pathogens.