Search results
Nervous System The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Respiratory System The respiratory system provides oxygen to the body’s cells while removing carbon dioxide, a waste product that can be lethal if allowed to accumulate.
- Muscular
Skeletal muscle is the only voluntary muscle tissue in the...
- Cardiovascular
The cardiovascular system consists of the heart, blood...
- Digestive
The liver weighs about 3 pounds and is the second largest...
- Endocrine System
Human chorionic gonadotropin (HCG) assists progesterone by...
- Respiratory
The cells of the human body require a constant stream of...
- Urinary
The internal urethral sphincter is made of smooth muscle and...
- Male Reproductive System
The scrotum is made up of 2 side-by-side pouches with a...
- Nervous
The cell body is the roughly round part of a neuron that...
- Immune / Lymphatic Systems
Let’s explore internal defenses in greater detail. Fever. In...
- Muscular
- Nervous System
- Reproductive System
- Skin
- Muscular System
- Endocrine System
- Immune System
- Digestive System
- Circulatory System
The brain and spinal cord form the central nervous system, which works to process and send nerve signals, interpret information, and produce conscious thought. The nervous system helps the body regulate every functionTrusted Source, including every other organ system. The nervous system also includes an extensive network of neurons throughout the b...
The reproductive system includes the organs that enable a person to reproduce and experience sexual pleasure. In females, the reproductive system also supports the growth of a fetus. The male reproductive systemorgans include: 1. the testes 2. the epididymis 3. the vas deferens 4. the ejaculatory ducts 5. the prostate gland 6. the seminal vesicles ...
The skin is the body’s largest organ. It is part of the integumentary system, which includes skin, hair, nails, and fat. The integumentary system helps regulate body temperature, protect the body from dangerous pathogens, make vitamin Dfrom sunlight, and provide sensory input. The skin comprises three layersTrusted Source: 1. The epidermis:This is ...
The muscular system includes a vast network of muscles. There are three types of muscles: 1. Skeletal muscles:These are voluntary muscles, meaning a person can decide when to move them. The biceps and triceps are examples of skeletal muscles. 2. Cardiac muscles:These are involuntary muscles that help the heart pump blood. 3. Smooth muscles:These ar...
The endocrine system is a network of glands throughout the body. These glands release important chemicals called hormones, which help regulatethe function of virtually every organ and organ system in the body. The endocrine system includes several major glands, including: 1. the pancreas 2. the thyroid 3. the adrenal glands 4. the pituitary 5. the ...
The immune system helps the body prevent infections and fights them off when they do occur. Many organs play a role in the immune system. For example, the skin prevents dangerous pathogens from entering the body, and the salivary glands release saliva that can help break down some dangerous sources of infection in food. The lymphatic system plays a...
The digestive systemTrusted Sourceis the group of organs that digest food, as well as the various structures within that release substances to aid digestion and absorption. It includes: 1. the mouth 2. the esophagus 3. the salivary glands 4. the gallbladder 5. the liver 6. the pancreas 7. the stomach 8. the small and large intestines 9. the appendi...
The circulatory system includes the many blood vessels circulating throughout the body. It includes veins, arteries, capillaries, venules, and arterioles. The lymphatic system is also part of the circulatory system. It helps maintain the body’s fluid balance by collecting excess fluid and other particles from the blood. Lymph nodes are present with...
People also ask
What organs and systems are included in a human body?
How many organ systems are in the human body?
What are the 5 vital organs in the human body?
How do human organs work together?
Mar 21, 2024 · The human body is the physical substance of the human organism. Characteristic of the vertebrate form, the human body has an internal skeleton with a backbone, and, as with the mammalian form, it has hair and mammary glands. Learn more about the composition, form, and physical adaptations of the human body.
- The Editors of Encyclopaedia Britannica
- What is the chemical composition of the human body?Chemically, the human body consists mainly of water and organic compounds—i.e., lipids, proteins, carbohydrates, and nucleic acids. The human body...
- What are the four main types of tissue in the human body?The four main types of tissue in the human body are epithelial, muscle, nerve, and connective.
- What are the nine major organ systems in the human body?The nine major organ systems in the human body are the integumentary system, the musculoskeletal system, the respiratory system, the circulatory sy...
Jun 20, 2023 · Digestive system. Skeletal system. Muscular system. Nervous system. Reproductive system (female) Reproductive system (male) Each organ in your body’s 11 organ systems work so you can perform ...
- Skeletal system. The skeletal system is composed of bones and cartilages. There are two parts of the skeleton; axial and appendicular. The axial skeleton consists of the bones of the head and trunk.
- Muscular system. The muscular system consists of all the body muscles. There are three muscle types; smooth, cardiac and skeletal muscles. Smooth muscle is found within walls of blood vessels and hollow organs such as the stomach or intestines.
- Cardiovascular system. The cardiovascular system is comprised of the heart and the circulatory system of blood vessels. The heart is composed of four chambers; two atria and two ventricles.
- Respiratory system. The respiratory system consists of a series of organs; the nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles and lungs (alveoli).
An anatomy atlas should make your studies simpler, not more complicated. That’s why our free color HD atlas comes with thousands of stunning, clearly highlighted and labeled illustrations and diagrams of human anatomy. No missing information, no confusion, and no hidden costs; simply a learning resource you can trust to make your studies easier.
From left to right: single muscle cell, multiple muscle cells together forming muscle tissue, organ made up of muscle tissue (bladder), and organ system made up of kidneys, ureter, bladder and urethra. At each level of organization—cells, tissues, organs, and organ systems—structure is closely related to function.
