write about human body parts , organs doing their functions, heart , brain , liver, everything
point wise
Answers
Answer:
Some of the easily recognisable internal organs and their associated functions are:
The brain. The brain is the control centre of the nervous system and is located within the skull. ...
The lungs. ...
The liver. ...
The bladder. ...
The kidneys. ...
The heart. ...
The stomach. ...
The intestines.
Explanation:
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U.S. National Library of Medicine
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Basic Body Structure and Organization
Organ Systems of the Human Body
Organ Systems and Organs
Before one can understand how xenobiotics affect these different body components, it's important to understand normal body components and how they function. For this reason, this section provides a basic overview of anatomy and physiology as it relates to toxicity mechanisms.
Basic Body Structure and Organization
We can think of the basic structure and functional organization of the human body as a pyramid or hierarchical arrangement in which the lowest level of organization (the foundation) consists of cells and chemicals. Organs and organ systems represent the highest levels of the body's organization (Figure 1).
Diagram of a six-layer pyramid to represent the hierarchical organization of human body components into the following, from bottom layer to top: chemicals, cells, tissues, organs, organ systems, and organism.
Figure 1. Pyramid represents a hierarchical organization of human body components
(Image Source: NLM)
Simplified definitions of the various levels of organization within the body are:
Organ system — a group of organs that contribute to specific functions within the body. Examples include:
Gastrointestinal system
Nervous system
Organ — a group of tissues precisely arranged so that they can work together to perform specific functions. Examples include:
Liver
Brain
Tissue — a group of cells with similar structure and function. There are only four types of tissues:
Epithelial
Connective
Muscle
Nerve
Cell — the smallest living units in the body. Examples include:
Hepatocyte
Neuron
Chemicals — atoms or molecules that are the building blocks of all matter. Examples include:
Oxygen
Protein
In the animation, an image of each level of structural organization of the body is displayed, beginning with chemicals, then cells, then tissues, then organs, then organ systems, and finally, the organism.
Animation 1. Levels of structural organization of the body
(this video has no sound)
(Images obtained from iStock Photos, ©)
Organ Systems of the Human Body
The human body consists of eleven organ systems, each of which contains several specific organs. An organ is a unique anatomic structure consisting of groups of tissues that work in concert to perform specific functions. Table 1 includes the structures and functions of these eleven organ systems.
Organ System Functions Organs
Integumentary
Barrier to invading organisms and chemicals
Temperature control
Skin
Hair
Subcutaneous tissue
Skeletal
Supports and moves body
Protects internal organs
Mineral storage
Blood formation
Bones
Cartilage
Ligaments
Bone marrow
Muscular
Locomotion
Heat production
Muscles
Tendons
Nervous
Coordinates activities of other organ systems
Responds to sensations
Brain
Spinal cord
Nerves
Eyes
Ears
Endocrine
Regulates body functions by chemicals (hormones)
Pituitary gland
Parathyroid gland
Thyroid gland
Adrenal gland
Thymus
Pancreas
Gonads
Cardiovascular
Transports oxygen and nutrients to tissues
Removes waste products
Heart
Blood
Blood vessels
Lymphatic
Returns tissue fluid to blood
Defends against foreign organisms
Spleen
Lymph nodes
Thymus
Lymphatic vessels
Respiratory
Oxygen/carbon dioxide exchange
Lungs
Trachea
Larynx
Nasal cavities
Pharynx
Digestive
Processes foods
Absorption of nutrients into body
Stomach
Intestinal tract
Liver
Pancreas
Esophagus
Salivary glands
Urinary
Elimination of wastes
Regulates pH and volume of blood
Kidneys
Urinary bladder
Urethra
Reproductive
Produces germ cells (eggs and sperm)
Environment for growth of fetus (female)
Ovaries
Uterus
Mammary glands
Testes
Prostate gland
External genitalia
Table 1. Organ systems of the human body