The muscular system diagram depicts the anatomy of various human muscles including biceps, tripezius, deltoid, triceps, abdominis (abs) and other key muscle groups. While multiple groups exists, overall, there are 3 different types of muscle tissues: skeletal, visceral and cardiac.
Skeletal muscles are attached to the bones, often via a joint with muscles used to bring the bones closer together. They are usually attached to the skeleton. These muscles are also controlled consciously by a human while performing such tasks as running, speaking and typing. The cells in these skeletal muscles are made of multiple progenitor cells coming together into the long and strong fibers. The diagram below summarizes skeletal muscles.
Visceral muscles are the weakest of all muscles and are a part of the organs and body systems such as blood vessels and stomach. They are used to move matter through the organ (e.g. blood, food, etc) and appear smooth and uniform when looking at the microscope. They are unconsciously controlled by the brain.
Cardiac muscle is located in the heart and pumps blood through the arteries. Similarly to visceral muscles, it is not controlled consciously; instead it stimulates itself while adjusting to the hormone levels. Cardiac tissue is very strong.
Nerve Cell Diagram below is a typical illustration of this type of a human cell that makes up the cells in the nervous system. Nerve cell parts include nucleus, soma, dendrite, axon, myelin sheath, axon terminal, node of ranvier. This composition of the cell ensures that the neuron is functional with chemical signals transmitted to neighboring neurons.
All nerve cells respond to the external stimulus with an electric discharge that produces an electrical pulse of about 50-70 millivolts. This pulse is often referred to us an action potential. The electrical pulse travels down axon, which is the the fiber-like extension of the nerve cell. The speed of the impulse is about few tens of a meters per second and is a function of the fiber size. The transmission can be sent to a nearby nerve cell via a chemical neurotransmitter as soon as it gets to the axon terminal bundle. These types of nerve cells can be found all over the human body.
Circulatory System is responsible for delivering oxygen, water and nutrients to various body systems and cells while also transporting waste away (e.g. carbon dioxide). The circulatory system consists of the heart, blood vessels such as aorta, vein, ventricle, capillaries and blood itself.
The heart is essentially a muscle that pumps blood ensuring its movement throughout the body. The heart is located a bit to the left from the center of one’s chest. Well functioning circulatory system depends on a health heart, which in turn is dependent on regular exercises, healthy eating and not smoking.
The blood vessels carry blood throughout the body. The blood flows away from the heart through arteries. Arteries carry blood high in oxygen content. Veins on the other hand carry blood towards the heart. Capillaries are small blood vessels that connect arteries to veins. Nutrients, oxygen, water and carbon dioxide pass through the capillary walls.
The blood is the red substance that transports all the above throughout the body cells. The blood consists of red blood cells, white blood cells, platelets and plasma. Red blood cells carry oxygen from the lungs towards body cells and deliver carbon dioxide back. Carbon dioxide is than exhaled from the lungs. White blood cells help the body fight infections by destroying germs. Platelets are cells that stop bleeding by forming a natural seal to the damaged blood vessel. The red blood cells, white blood cells and platelets are formed by the bone marrow, which is a soft tissue in the bones. Plasma is the liquid part of the blood, produced in the liver, which makes about half of the blood content. All the above make up the circulatory system presented below:
Ear Diagram below shows the various parts of a human ear. Ear anatomy includes external, middle and inner parts.
The outside portion, called the outer ear includes pinna, a ridged cartilage, through which sound travels into the short tube called the external auditory canal. This canal goes all the way to the eardrum.
Sound waves vibrate the eardrum connected to the cochlea, part of the inner ear. Sounds are then converted into nerve impulses that are further conducted to the brain. The semicircular canals are attached to the nerves and cochlea in the inner ear and are filled with fluid. Their function is to communicate the position of the head and body’s balance to the brain. The eustachian tube allows fluid to flow from the middle ear into the throat.
Essentially, a human ear is a system consisting of three organs that work together on hearing and balance in conjunction with the nervous system. The diagram below displays the human ear anatomy.
Human Organs make up the six key body systems. These are the skeletal system, muscular system, nervous system, digestive system, respiratory system and circulatory system. Lets explain how each of these play a role in sustaining and functioning of the human body.
Skeletal system provides structure to the body and protects internal organs. It is made of bones, skull and skeleton. The muscular system supports the body and allows it to move. Biceps and triceps are examples of muscles found in this system. The nervous system controls thought, sensation, movement and virtually all body functions. The key part in this is played by the brain.
Digestive system breaks down food and absorbs nutrients. It consists of the stomach, small and large intestines and other parts. The respiratory system takes oxygen and releases carbon dioxide through lungs. Finally the circulatory system with heart at its core transports oxygen, nutrients and other substances to cells and carries away waste.
The below diagram displays where each of these organ systems is located in the human body.