lesson 2 Flashcards
(23 cards)
The human body is a single structure but it is made of billions of smaller structures of four major kinds
cells, tissues, organs, and systems
is an organization of several different kinds of tissues so arranged that together can perform a special function
Organ
is an organization of varying numbers and kinds of organs so arranged that together they can perform complex functions for the body
System
Ten major systems include
- the skeletal
- muscular
- nervous
- endocrine
- cardiovascular
- lymphatic
- respiratory
- digestive
- urinary
- reproductive system
- A state of balance among all the body systems needed for the body to survive and function correctly
- state of relative constancy, of its internal environment
Homeostasis
Life depends on certain physical factors from the environment, which include
water, oxygen, nutrients, heat, and pressure
- It gives the body its shape, allows movement, makes blood cells, provides protection for organs, and stores minerals
- it has 98% of the body’s total calcium
- up to 75% of phosphorus
Skeletal system (also the musculoskeletal system)
The skeletal system is composed of
206 bones
function of the skeletal system
body support, protection, movement, blood cell production
- Function Their predominant function is CONTRACTABILITY
- BLANK attached to bones or internal organs and blood vessels
- are responsible for movement
Muscular system
The muscular system is composed of specialized cells called
Muscle fiber
a system of organs that includes the heart , blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrae.
Cardiovascular system
Function of the circulatory system (cardiovascular system)
- Pumps blood from the heart to the lungs to get oxygen.
- The heart then sends oxygenated blood through arteries to the rest of the body.
- The veins carry oxygen-poor blood back to the heart to start the circulation process over
to move fresh air into your body while removing waste gases
Respiratory system
Once in the lungs, oxygen is moved into the bloodstream and carried through your body. At each cell in your body, oxygen is exchanged for a waste gas called
Carbon dioxide
Breaks nutrients into parts small enough for your body to absorb and use for energy, growth, and cell repair
Digestive system
to eliminate waste from the body, regulate blood volume and blood pressure , control levels of electrolytes and metabolites, and regulate blood.
Urinary system
Also known as the urinary tract or renal system, consists of
the kidneys, ureters, bladder, and the urethra
- the system is a messenger system comprising feedback loops of the hormones released by the internal glands of an organism directly into the circulatory system, regulating distant target organs
- made up of all the body’s different hormones, regulates all biological processes in the body from conception through adulthood and into old age, including the development of the brain and nervous system, the growth and function of the reproductive system, as well as metabolism and blood sugar
Endocrine system
is the neural control center for all endocrine systems
Hypothalamus
- is our body’s sewerage system
- It is part of your immune system. It produces and releases lymphocytes (a type of white blood cell) and other immune cells. These cells look for and destroy invaders — such as bacteria, viruses, parasites, and fungi — that may enter your body
- is important for the optimal functioning of our general and specific immune
- is an organ system in vertebrates that is part of the immune system, and complementary to the circulatory system
Lymphatic system or lymphoid system
is a collection of parts able to work together to serve a common purpose, growth, reproduction and survival
Body system
the most important organ system in the body
Brain and the nervous system
