The Human Body system, The Human body facts
The Human Body system, The Human body facts: Man is a complex creature with complex anatomy and lifestyle compared to other creatures. Organ systems are involved in the smooth functioning of the body in the human body. Our bodies have specific biological systems to perform specific functions. Today in this article we will tell you How our body works to keep us efficient.
Our Skeleton System
Skeleton is either a fluid-filled body cavity, exoskeleton, or internal bone. joints, muscles, and Bones are a part of the skeletal system of humans. The skeletal system is divided into 2 parts:
Axial Bone – The bone that forms the main axis of the body such as the bones of the skull, vertebral column, and the chest is called axial bone.
Appendages – This includes the bones that support the appendages.
Within the nervous system, nerves that transmit signals and electrical impulses are spread throughout the body in response to external changes.
The human nervous system includes:
- The central nervous system (CNS) includes the brain and spinal cord.
- The peripheral nervous system (PNS) connects the CNS to other parts of the body and is made up of nerves (bundles of neurons).
- autonomic nervous system (nervous system)
The most complex part of the human body is the brain. It is a three-pound organ, the seat of the intellect, the understanding of the senses, the initiator of the movement of the body, and the controller of behavior. The brain is divided into three basic units:
Forebrain- This is the largest and thinking part of the brain. It consists of regions that receive sensory impulses from various receptors. There are different parts of the forebrain for special functions like hearing, smell, vision, etc.
Midbrain – connects the forebrain to the anterior brain.
Anterior brain – The anterior brain controls vital body functions such as respiration and heart rate.
It is the largest part of the human brain and is located at the top of the brain. This includes your ability to remember, plan, imagine and think. It also controls voluntary actions.
It is located at the base of the cerebrum and controls the sleep and wake cycles of the body. It also has the power to control the urge to eat and drink.
The medulla forms the brain stem with the pons. It is located at the base of the brain and operates in the spinal cord. It controls various involuntary functions.
For example heartbeat, respiration, pupil size, blood pressure, salivation, vomiting, etc.
The circulatory system is responsible for the circulation of blood throughout the body for proper functioning. It consists of 4 parts:: Heart, artery, vein, and blood.
The human heart
The human heart is an organ that pumps blood throughout the body through the circulatory system, supplies oxygen and nutrients to tissues, and removes carbon dioxide and other wastes.
Human Heart Function
The heart circulates blood through two routes:
- Pulmonary Circuit
- Systemic Circuits
In the pulmonary circuit, deoxygenated blood leaves the right ventricle of the heart via the pulmonary artery and travels to the lungs, then returns as oxygenated blood to the heart’s left atrium via pulmonary blood.
In the systemic circuit, oxygen-rich blood travels the body from the left ventricle into the aorta, and from there enters the arteries and capillaries where it supplies the body’s tissues with oxygen. Deoxygenated blood travels through the veins into the vena cava and again, enters the right atrium of the heart.
The human digestive system is a coiled, muscular tube (6–9 m long when fully extended from the mouth to the anus).
The urinary system
The urinary system is made up of the kidneys, ureters, bladder, and urethra. An evolutionary modification of the nephridium, the nephron is the functional unit of the kidney.
the endocrine system
The endocrine system is made up of glands that produce and secrete hormones, chemical substances that are produced in the body, which control the activity of cells or organs. These hormones control body growth, metabolism (the body’s physical and chemical processes), and sexual development and function.
The Human body facts
- There are 118 bones in both hands and feet.
- The total number of bones in the human body is 206.
- The total number of bones in childhood is 300.
- The total number of bones in the head is 29.
- The largest bone in the body is the femur.
- The smallest bone in the body is the stapes.
- Tendon connects muscle and bone together.
- The muscle that connects bones to bones calls a ligament.
- The ligaments of the human body are made up of yellow fibers.