CH2: Human Body & Development Flashcards
FUNCTIONS OF SKELETAL SYSTEM (5)
- Support body
- Maintain posture
- Allow for movement
- Protect vital organs
- Produce blood cells in marrow
TEETH ARE IN DIFFERENT SHAPES & SIZES BECAUSE OF FUNCTIONS (6)
INCISORS Front teeth – For biting CANINES side teeth – for tearing PREMOLARS & MOLARS back teeth – for chewing & grinding
SCOLIOSIS (1)
Lateral curvature of spine
OSTEOPOROSIS (2)
- Older -> more fragile -> can more easily fracture & it’s more difficult to heal
- Sufficient calcium & regular exercise needed to maintain strong bones & prevent osteoporosis
CALCIUM (2)
- Strong & healthy bones & teeth
2. In dairy products, dark green vegetables & some fish
DENTAL CARE (5)
- Brushing teeth
- Flossing
- Avoiding candies
- Eating balanced diet with sufficient vitamin C & D
- Drinking water
- Using toothpaste with fluoride
- Regular dental examinations
3 TYPES OF MUSCLES (3)
- Skeletal (voluntary muscles)
- Smooth (Involuntary muscles)
- Cardiac (Heart muscles)
SKELETAL MUSCLES (5)
- Connected to bones
- Hold bones in place
- Shape body
- Move bones – controlled voluntarily)
a. 2 opposing muscles used
i. Flexors – bend
ii. Extensors - straighten
b. 1 contracts & other relaxes
SMOOTH MUSCLES (4)
- Involuntary
- Slower but more enduring than skeletal muscles
- In walls of many internal organs
a. Stomach, lungs, intestines & blood vessels
AUTONOMIC NERVOUS SYSTEM - Automatically regulates contracting and relaxing of smooth muscles -> controls digestion, breathing & blood flow.
CARDIAC/ HEART MUSCLES (3)
- Shares characteristics of smooth and skeletal muscles
- Involuntary & constantly work (like smooth muscles)
- Can respond quickly & change pace when needed (like skeletal muscles)
FUNCTIONS OF SKIN (5)
- Protects body from germs & other things that cause diseases in environment & keeps vital fluids inside
- Excretes dissolved mineral slats & little body waste (urea & lactic acid)
- Helps regulate & maintain ideal body temperature
a. To warm body -> Reduces heat loss -> Constricts blood vessels & pores
b. To cool body -> perspiration - Converts ultraviolet rays from sun into vitamin D
- Contains sensory receptors for pressure, touch, pain, heat & cold
INHALATION (1)
Diaphragm contracts -> rib cage expands -> enlarges chest cavity -> pulls air into lungs
EXHALATION (1)
Diaphragm relaxes -> chest cavity shrinks -> forces air out of lungs
PROTECTION OF RESPIRATORY SYSTEM (4)
INVOLUNTARY 1. Sneezing & Coughing VOLUNTARY 2. Keeping hygienic to prevent spread of germs 3. Not smoking 4. Controlling air pollution
FUNCTIONS OF CIRCULATORY SYSTEM
- Consists of heart, blood vessels & blood
- Continuously moves blood through every part of body.
- Takes blood with oxygen to all cells
- Takes waste products to lungs and kidneys to remove it
- Also carries regulating hormones, chemicals & network defensive cells (protect body from invading pathogens)
3 TYPES OF BLOOD VESSELS (6)
ARTERIES
Move blood away from heart
MAIN ARTERY
Aorta
VEINS
Bring back blood to heart
MAIN VEINS
Superior & Inferior Vena Cava
CAPILLARIES
Tiny blood vessels
Connect veins & arteries
POINTS OF EXCHANGE
Nutrients & oxygen given to cells & waste products removed