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.
Alkali metals are any of the elements found in Group IA of the periodic table (the first column). Alkali metals are very reactive chemical species that readily lose their one valence electron to form ionic compounds with nonmetals. All elements in the alkali metal group occur in nature.
D. It is the general term used to describe the amount of water vapor in the air
Explanation:
It's been a while since I've taken meteorology (2 years), but I think this is the correct answer because humidity in general refers to the amount of water vapor in the air and as we are discussing relative humidity, it cannot indicate the actual quantity of water vapor in the air (thus ruling out B). Therefore, D makes the most sense. I believe C refers to adiabatic cooling.
Photosynthesis and respiration are the opposite processes, basically speaking. Photosynthesis gets its name from light-dependent reactions, which involve photolysis of water (breakdown of H2O into oxygen and hydrogen), and then combining hydrogen with small sugar molecules, while also incorporating CO2 into them.
The impacts of climate change include warming temperatures, changes in precipitation, increases in the frequency or intensity of some extreme weather events, and rising sea levels.
