Body Cavities + Homeostasis

What are the functions of the nervous system?

Sensory input (sensory neurons), interpretation of command (interneurons), Motor output (motor neurons)

What are the 2 main body cavities and their function?

Two main cavities: Ventral (front facing), dorsal (back facing)

Function: house internal organs

What does the ventral cavity consist of? (THe PErfect PLan ABout PEas)

Thoracic cavity: chest
Pericardial cavity: houses heart
Pleural cavities: one for each lung
Abdominal cavity: housing organs of digestive system, liver, spleen, gallbladder
Pelvic cavity: housing reproductive organs + bladder

What does the dorsal cavity consist of (CRanberry SPonge)?

Cranial cavity: brain
Spinal cavity: spinal cord

What are body membranes?

Inner lining of body cavities, tubes and some organs
Outer lining of body

Commonly composed of epithelial + connective tissues

What are the 4 major types of body membranes?

Mucous: Lines tubes open to the exterior of body
Serous: Lines cavities of body, covers organs, produces serous fluid
Cutaneous: Skin
Synovial: protects joints, produces synovial fluid

What is homeostasis?

Body’s ability of maintain constant internal conditions despite fluctuations in external surroundings

What are the 5 body systems?

Integration and control, maintenance, integumentary, support and movement, continuance

Integration and control

Organs control and regulate function of all other organ system
Nervous system: sensory functions
Endocrine system: prod. hormones which regulate body functions

Maintenance

Digestive system: Absorbs nutrients, eliminates waste
Cardiovascular: transport nutrients, gases, hormones + wastes to and from cells
Lymphatic: immune response to pathogens
Respiratory: exchange of gases, supplying oxygen
Urinary: prod/elimination of urine

Integumentary

Skin: Forming protective barrier, maintain body temp, prod. Vitamin D,sensory area

Support and movement

Enable body to move, maintain balance, protect organs, provide mechanical support

Muscular: movement of bones @ joints
Skeletal: protect organs, calcium storage, prod. blood cells

Continuance

Development of gametes + offspring
Reproductive: prod of ovum in fem, sperm in males, supports development of fetus in fem

Homeostasis: Positive and Negative Feedback

Positive: Brings about a higher/big change in same direction (take bodies away from norm rage)
Negative: Output of system opposes changes to input of system (keep body in norm. range)