<h2>
Answer:</h2>
The Fluid present in the knee joint is Synovial fluid.
<h2>
Explanation:</h2>
- <u>Synovial fluid</u> is the viscous liquid that helps in lubrication of joints and maintains their smooth movement.
- Other than knee joint this fluid is present in all of the joints including shoulders, hips, hands, and feet.
- Various joint conditions like arthritis, gout, infections and bleeding disorders depends upon the quantity and the quality of the fluid
- In old age this fluid decreases with increase in age that is the reason why the elderly people suffer from joint pain.
- For analysis a sample of this fluid taken and examined, this process is known as arthrocentesis.
Result: Synovial fluid is present in knee as well as every joint of our body for smooth movement.
When light passes from a material of one refractive index to another (for example: from glass to air), it bends.
Answer:
Competition
Explanation:
Predation refers to one animal killing & eating the other animal. Eg, as referred - tiger & deer (former eats latter)
Competition is when an organism competes with another for resources. Eg, as given - paddy & weeds (they compete for growth resources - like nutrients etc).
The Nervous System and Endocrine Systems are the two systems which are responsible for controlling the whole body of an organism.
<h3>Which organ systems function as control systems, communicating with other cells/organs to regulate their activities?</h3>
The nervous system is the system which controls the system, major controlling, regulatory, and communicating system in the body. The nervous system is the center of all mental activity including learning, memory and thought. Together with the endocrine system, the nervous system is responsible for regulating and maintaining the homeostasis which helps to maintain the internal environment.
So we can conclude that the Nervous System and Endocrine Systems are the two systems which are responsible for controlling the whole body of an organism.
Learn more about Cells here: brainly.com/question/1399230
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Temperate Marine climates are warm, wet, and located on the edge of the tropics.
Hope this helps!!
