32342343242342 Essay

This essay has a total of 1453 words and 7 pages.


Body Systems

Knowing about the body systems is important. When you know about your body, youíll be more
healthy than if you didnít. Any sport player needs to know and understand how all his
muscles work, so when it comes to exercise or working out, they can know what their limits

The skeletal system is made up of your bones, ligaments, and tendons. It determines the
shape and symmetry of the body; acts as a protective device for your organs; acts as a
firm base for the attachments of muscles (without bones, your muscles would not function
properly); and the marrow tissues in the cavity of the bones produces red cells and some
white cells, required in your blood.

Humans have an endoskeleton, meaning that the skeleton is located inside of the body. It
consists of about 200 bones. The number of bones varies, because some bones fuse at
different periods of time. Most bones are hollow with marrow bones inside. Ligaments
connect bones to bones, and tendons connect bones to muscles.

The human skeleton is divided into an appendicular skeleton (bones of arms and legs or
"appendages"), and the axial skeleton (skull, backbone or "vertebrae")

The human body contains more than 650 individual muscles which are attached to the
skeleton, which provides the pulling power for us to move around. The main job of the
muscular system is to provide movement for the body. The muscular system consists of three
different types of muscle tissues: skeletal, cardiac, and smooth muscles. Each of these
different tissues has the ability to contract, which then allows body movements and
functions. There are two types of muscles in the system and they are the voluntary and
involuntary muscles. The muscles that we are allowed to control ourselves are called the
voluntary muscles. The muscles we canít control are called the involuntary muscles. The
heart, or the cardiac muscle, is an example of involuntary muscles.

The human nervous system is responsible for sending, receiving, and processing nerve
impulses throughout the body. All the organs and muscles inside your body rely upon these
nerve impulses to function. It could be considered as the master control unit inside of
your body. Sense organs provide the nervous system with information about the environment
by means of such senses as sight, hearing, smell, taste, touch, pressure, and pain. Nerves
are connected throughout the whole body to the brain. They carry the information
throughout the body in the form of electrochemical signals called impulses. These impulses
travel from the brain and spinal cord to the nerves located throughout the body. It is
largely made up of specialized cells called neurons. Each of these neurons has a cell
body, or cyton, which contains the nucleus and organelles. It takes the corporation of
three systems to carry out the mission of the nervous system. They are the central, the
peripheral, and the autonomic nervous systems.

The endocrine system is a collection of special organs in the body that produce hormones.
Theses organs are usually called the "glands." They are located in different parts of the
body. For example, the pituitary is in the brain, the thyroid is in the neck, the adrenal
glands are in the kidneys, and the sexual glands (ovaries and testes) are located in the
sexual organs. Each gland releases a hormone into the blood, which travels all through the
body. Hormones regulate our body activities, for example: growth, sleep, sudden actions,
feelings and blood sugar for energy.

The digestive system contains organs for changing food chemically for absorption by body
tissues. It is also responsible for processing food, breaking it down into usable
proteins, minerals, carbohydrates, fats, and other substances. The digestion process
involves breaking food into simple soluble substances absorbable by tissues.

The digestion process includes both mechanical and chemical processes. The mechanical
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