Transcript INTRODUCTION TO HUMAN BIOLOGY pp. 907-910

INTRODUCTION TO
HUMAN BIOLOGY
pp. 907-910
cells  tissues organs  organ
systems
BODY TISSUES
• muscle: contract in coordination upon
stimulation (skeletal, cardiac, smooth)
• nervous: receive and transmit information
and signals (made of cells called neurons)
• epithelial: line surfaces of bodies, cavities,
canals
• connective: cells surrounded by extracellular, non-living tissue called a matrix
(bone, cartilage, tendons, blood)
ORGANS
• Tissues working together
BODY CAVITIES
• Spinal, cranial, thoracic,
diaphragm, abdominal,
pelvic
Know the locations in your
body
ORGAN SYSTEMS
• Muscular: support •
and movement
Skeletal: protection
and support
• Circulatory:
transport of gases,
nutrients, waste, and
chemicals througout
body.
• Respiratory: Gas
exchange
• Endocrine: controls • Nervous: regulates
body via impulses
body function via
chemical messengers.
• Excretory:
removal of liquid
and solid wastes
• Digestive:
breakdown and
absorption of
food
Immune: Fights
• Reproductive:
production of sex cells to pathogens and
disease
make offspring
Integumentary: protection and
thermoregulation
• Barrier against mechanical and chemical
injury
• Protection of microbial invasion
• Insulation against heat loss
• Evaporative cooling through sweating
• Sensory for environment
• Vitamin (D) synthesis
SKIN
• Epidermis- dermal pigmentation
Melanocytes make melanin (melanin is
a black pigment and carotene is an
orange pigment) and is inherited
• Dermis-inner layer composed of blood
vessels, nerves, hair follicles, glands
• Glands
1. Oil glands attached to hair follicles
secrete sebum (oils)
2. Sweat glands regulate body temperature
• Subcutaneous: fat cells (insulation)
• Nails are made of keratin (like hair) and protec
ends of toes and fingers
• Hair is produced by hair follicles and insulates the
body