1.why blood is regarded as a connective tissue
2.why tight muscle get tired soon but not a muscle of the heart
3.why cells of meristematic tissue lack vacuoles
4.why ice is applied to the injured tissue
5.why unstrained muscles are called so
gave reason please
Answers
1-:Blood is regarded as a connective tissue because as the blood is circulated throughout the body due to pumping action of heart, it carries different materials and gases from one part of the body to another. Hence, it connects different tissues and organs of the body and thus, called as a connective tissue
2-: Cardiac muscle resists fatigue so well because it's got more mitochondria than skeletal muscle. With so many power plants at its disposal, the heart doesn't need to stop and chill out. It also has a steady supply of blood bringing it oxygen and nutrients.
3-:Meristematic cells divide frequently and give rise to new cells and hence they need dense cytoplasm and thin cell wall. Vacuoles causes hindrance in cell division as it is full of cell sap to provide turgidity and rigidity to the cell. ... Meristematic cells do not need to store these nutrients as they have compact shape.
4-: Icing an injury typically takes place immediately after the injury occurs. Using a cold compress or ice pack on a strained muscle can decrease inflammation and numb pain in the area. Icing is effective at reducing pain and swelling because the cold constricts blood vessels and decreases circulation to the area.
5-:Smooth muscles are called unstriated muscles because these muscles show no cross striations and look smooth .