System components and functions Flashcards
Epidermis
Protects deeper tissues with a covering. Produces Vitamin D
Dermis
Contains blood vessels, nerves and glands. Supplies epidermis with nutrients and oxygen. Has fat stores.
Hair Follicles
Percives stimuli through the nervous system
Hairs
Insulation, Protection and sensory purposes
Sebaceous glands
Lubricates hair shafts and epidermis.
Sweat Glands
Thermoregulation
Nails
Stiffens and protects tips of fingers and toes
Sensory receptors
Detects sensations. (Touch, pressure, temperature, pain)
Hypodermis
Attaches skin to deeper layers. Provides Insulation through fat stores and cushioning.
What are the two layers of the dermis?
Papillary (aeolar tissue), Reticular (connective tissue)
Tactile Corpuscle
Detecting touch and vibrational stimuli
Lamellated Corpuscle
Detecting pressure
Skeletal Muscles
Movement, produces heat through shivering, supports the skeleton and protects soft tissues. Also controls entrances and exits for the digestive, respiratory and urinary systems.
Axial muscles
Provides support and positioning of axial skeleton
Appendicular muscles
Supports and moves limbs
Tendons
Rope like connections between muscle and bone. Transmits force generated by muscle contractions into the bones.
Aponeuroses
Broad, flat sheet like tendons that attach muscles to other muscles or to bone.
Bone
Provides support, serves as attachment sites, stores minerals such as calcium and phosphorus.
Cartilage
Connective tissue which provides cushioning between bones, (reducing friction and allowing for smooth movements)
Ligaments
Fibrous tissues which connect bones to other bones at joints. Limits excessive movement and prevents dislocation.
Axial Skeleton
Protects the brain and spinal cord, sense organs and soft tissues of the thorax. Supports body weight over lower limbs
Appendicular skeleton
Provides internal support and positioning of the external limbs. Allows muscles to move the axial skeleton
Red bone marrow
Red blood cell production (occurs in flat bones)
Yellow bone marrow
Stores of fat cells (found in long bones), after a major bleeding some yellow bone marrow will turn to red.
Central Nervous system components
Includes the brain, spinal cord and optic nerve
Brain
Command centre, processes information and controls movement and behaviour.
Spinal Cord
Relays information to and from brain. Less complex integrative activities
Special senses
Sensory input to brain relating to sight, hearing, smell, taste and equilibrium
PNS
Links CNS with other systems and sense organs
Pineal Gland
Controls day and night rhythms (melatonin)
Hypothalamus/ Pituitary Gland
Controls other endocrine glands, regulates growth and fluid balance
Thyroid Gland
Metabolic rate by thyroxine
Parathyroid gland
Calcium levels
Adrenal glands
water and mineral balance(aldersterone) , Tissue metabolism, (cortisol) Cardio and Respiratory function (adrenaline)
Pancreas
Glucose control, production of digestive enzymes
Gonads
Sexual characteristics and reproduction
What is the result of too much growth hormone during childhood
Gigantism
What is the result of too much growth hormone as a adult
Acromegaly
IGF
insulin like growth factor secreted by liver
Lymphatic vessels
Contractile vessels, carries lymph fluid and lymphocytes from peripheral tissue to veins of CV system
B cells and T cells
Cells that carry out immune responses
Lymph nodes and tonsils
Monitor composition of lymph, stimulates immune response
Spleen
Monitors circulation, engulfs pathogens, recycle red blood cells, produces immune responses, large lymph nodes.
Thymus (lymphatic)
Controls development and maintenance of the T cell lymphocytes
Heart
Propels blood and maintains blood pressure
Arteries
Heart to capillaries
Capillaries
Diffusion between blood and interstitial fluids
Veins
Returns blood from capillaries to heart
Blood
Transport of O2, CO2, nutrients and hormones, removes waste, temperature regulation, defense against illness, acid base balance
Nasal cavity and paranasal sinuses
Filter, warm and humidity air and detect smells
Pharynx
Conducts air to larynx
Larynx
Protects opening to trachea, vocal chords
Trachea
Conducts air, kept open by cartilage
Bronchi
Conducts air between trachea and lungs
Lungs
Air movement, Gas exchange of O2, CO2 in alveoli, acid base control
Diaphragm
Muscle and air movement
Oral Cavity
Breaks up food
Salivary glands
Buffers and lubricant, Enzymes that begin digestion
Pharynx (Digestive)
Solid food and liquids to the esophagus, chamber shared with trachea
Esophagus
Food to stomach
Stomach
Secrete acid, Enzymes, Hormones
Small Intestine
Digestive enzymes, Buffers and hormones, absorbs nutrients
Liver
Secreted Bile, regulates nutrients in blood
Gallbladder
Concentrated bile
Pancreas
Digestive enzymes, Buffers, Endocrine cells
Large intestines and Anus
Water removal, waste storage and removal
Kidney
Forms and concentrates urine, regulates blood pH and ions, Blood volume and blood pressure, calcium production
Ureters
Urine to bladder
Bladder
stores urine
urethra
conducts urine to exterior
Testes
Produce sperm and hormones
Epididymis
Sperm maturation
Ductus deferens
sperm from epididymis
Seminal glands
Seminal fluid
Prostate glands
Produce Seminal fluid
Male Urethra
Sperm to exterior
External genitalia, Penis, Scrotum
Reproduction and thermal control testes
Ovaries
Procured and hormones
Uterine tubes
Delivery oocyte, Location of fertilization
Uterus
Embryonic development
Vagina and external genitalia
Lubrication, Sperm reception, Birth canal
Mammary glands
Nutrition for new born