5.2 Levels of Organization and Body Systems

Cardiovascular System 1

• This system uses blood to deliver nutrients throughout the body and remove wastes from the body.

Cardiovascular System 2

• The heart, which is the primary organ in this system, pumps blood around the body via a network of blood vessels.

Cardiovascular System 3

• Blood, blood vessels, and the heart make up this complex system.

Respiratory System 1

The primary functions of the respiratory system are to provide oxygen to the body’s tissues for cellular respiration, remove the waste product carbon dioxide from the body, and help maintain the acid-base balance

Respiratory System 2

• The nose, trachea, lungs, bronchi, and bronchioles are the major parts in this system.

Endocrine System 1

• The purpose of the endocrine system is to regulate various organs by releasing hormones (chemical messengers).

Endocrine System 2

• The pituitary, thyroid, parathyroid, and adrenal glands make up this system, along with the pancreas, testes, and ovaries.

Female Reproductive System 1

• This system functions to produce gametes and reproductive hormones.

Female Reproductive System 2

Its other function is to support a developing fetus and deliver it to the outside world

Female Reproductive System 3

• The ovaries, uterus, fallopian tubes, and mammary glands make up this system.

Male Reproductive System 1

• The function of the male reproductive system is to produce sperm.

Male Reproductive System 2

• The testes, scrotum, epididymis, vas deferens, prostate, seminal vesicles, and penis make up this system.

Lymphatic System 1

• The major function of the lymphatic system is to drain extra body fluid (lymph) and return it to the bloodstream.

Lymphatic System 2

• It is also associated with the immune system and plays an important role in immunity.

Lymphatic System 3

• This system consists of a network of lymphatic vessels, as well as the spleen and lymph nodes and ducts.

Urinary  System 1

• This system has various functions, but its main responsibility is cleansing the blood and removing wastes from the body.

Urinary  System 2

• It also stores urine until a convenient time for disposal and provides the structures for transporting liquid waste from the body.

Urinary  System 3

• This system consists of the kidneys, ureters, urethra, and bladder.

Nervous System 1

• This system is very complex and is responsible for controlling much of the body, including both voluntary and involuntary functions.

Nervous System 2

• It is responsible for taking sensory input and integrating it with other sensations, memories, emotional states, and learning.

Nervous System 3

• The nervous system can be divided into two main components: the central nervous system and the peripheral nervous system.

Nervous System 4

• It consists of the brain, spinal cord, and nerves.

Integumentary System 1

• This system is one of the largest body systems and makes up approximately 16% of total body weight.

Integumentary System 2

• The main component of this system is the skin.

Integumentary System 3

• The skin protects the inner organs, controls thermoregulation, functions as a sensory organ, and is necessary for vitamin D synthesis.

Digestive System 1

• The function of the digestive system is to break down food, release its nutrients, absorb those nutrients into the body, and excrete waste.

Digestive System 2

• This system consists of the stomach, liver, gallbladder, and small and large intestines.

Musculoskeletal System 1

The function of this system is to support the body, facilitate movement, and protect the internal organs.

Musculoskeletal System 2

• Bones are also vital in the production of red blood cells.

Musculoskeletal System 3

• The musculoskeletal system consists of all the bones, muscles, joints, tendons, and cartilage in the body.

bronch/o

bronchial tubes

cardi/o

heart

chondr/o

cartilage

col/o

colon

dermat/o

skin

encephal/o

brain

epitheli/o

skin

gastr/o

stomach

hepat/o

liver

lymph/o

lymph

nephr/o

Kidney

neur/o

Nerve

optic/o

Eye

pulmon/o

Lung

ur/o

urinary tract, urine, urea

vascul/o

blood vessels