The heart is the structure that pumps blood to the rest of the body. It’s composed of and surrounded by four kinds of tissues—co
nnective, muscle, epithelial and nervous tissues. How do you think the four tissue types support the function of the heart? How do the different tissue types support the idea that systems of specialized cells are critical for body functions?
Connective tissue holds the heart in place as the body moves. Muscle tissues and nervous tissues work together to pump the heart, enabling it to push blood through the circulatory system. Epithelial tissue protects the heart when the body moves so that other structures don’t damage it. The different types of tissues are made of different types of cells, and each tissue performs different functions for the body. These facts support the statement that systems of specialized cells are important for all body functions.
<span>Humans—and other large multicellular animals—are made up of four basic tissue types: epithelial tissue, connective tissue, muscle tissue, and nervous tissue. </span>Epithelial tissue<span> consists of tightly packed sheets of cells that cover surfaces—including the outside of the body—and line body cavities. For instance, the outer layer of your skin is an epithelial tissue, and so is the lining of your small intestine.</span> Epithelial cells are polarized, meaning that they have a top and a bottom side. The apical<span>, top, side of an epithelial cell faces the inside of a cavity or the outside of a structure and is usually exposed to fluid or air. The </span>basal<span>, bottom, side faces the underlying cells. For instance, the apical sides of intestinal cells have finger-like structures that increase surface area for absorbing nutrients. </span> Connective tissue consists of cells suspended in an extracellular matrix. In most cases, the matrix is made up of protein fibers like collagen and fibrin in a solid, liquid, or jellylike ground substance. Connective tissue supports and, as the name suggests, connects other tissues.
Muscle tissue<span> is essential for keeping the body upright, allowing it to move, and even pumping blood and pushing food through the digestive tract.</span>
Nervous tissue<span> is involved in sensing stimuli—external or internal cues—and processing and transmitting information. It consists of two main types of cells: neurons, or nerve cells, and glia. </span> All of these tissues are essential in keeping the body running, including the cardiovascular system in which the heart is involved. All of these tissues play a key role in maintaining the function of the heart, whether it be indirectly, or directly, each of these will keep your heart sustained, but without them you wont live long lol. Hope this helped.
b. Cities like New York, New Orleans, and Miami will be flooded by ocean water.
Explanation:
The theory says global warming will cause the temperature of the planetary atmosphere to rise. The hotter environment will make ice masses of Greenland, and the poles to melt completely and make coastal cities like New York, New Orleans, and Miami flooded by the ocean.
By process of ellimation, B is correct. Oils do disable fur insulation by damaging the fur of most animals. It spreads out becasue water and oil are differnet denisty and dont mix. Oil, overall, makes feathers less water-repellent bu exposing them to harsh chemicals.
A. anaerobic respiration in muscle cells, forming lactic acid
Explanation:
Running marathon is a vigorous exercise, which often leads to excessive use of oxygen in the cells of the athlete. This causes the cells to switch from the aerobic (with oxygen) to the anaerobic (without oxygen) mode of respiration. This anaerobic respiration produces a product called LACTATE OR LACTIC ACID.
The lactic acid becomes excessive and gets stored in the muscle cells of the athlete. This often leads to cramps, muscle pulls etc. during the marathon. Therefore, an individual running a marathon may experience periods of oxygen deprivation that can lead to anaerobic respiration in muscle cells, forming lactic acid.
