Muscle cells can get longer and shorter. how does this ability fit in with their job in the body?

Muscle tissue has a physiological property, contractility, provided by  muscle cells or myocytes, which involves reducing the length of the cell.

The function of skeletal muscle depends on the precise alignment of the myofilaments of actin and myosin in the myofibrilla. This is allowed thanks to  proteins that bind the myofilaments together and gives them the necessary elasticity  allows to regain their initial shape after the contraction (they increase their length).

The contractility of the heart muscle is essential for the survival of the patient. Without contractility, no more rhythm. The contractility of the biceps, triceps and quadriceps. allows to move the different members of the body (depending on their position) thanks to the tendons that are connected with the bones.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).