The Human Excretory System maintains homeostasis by regulating body fluid volume, ion concentration, pH, and elimination of metabolic wastes.
Parts:
a pair of kidneys
a pair of ureters
a urinary bladder
a urethra
The kidney:
dark purplish – immense blood supply
shaped like…
In the thoracic cavity, lies between the lungs, behind the breast bone
Structure
fist-sized
layers:
pericardium – tough protective sac
heart muscle - myocardium
endocardium -> valves
cardiac muscle:
never gets tired (doesn’t…
About 5 litres
pH 7.4
Function:
Transports
respiratory gases
nutrients
waste materials
hormones
enzymes
regulates
body temperature
pH
protects against
blood loss
foreign agents
Blood components:
Blood plasma 55%
Cellular elements…
Respiration: process by which living organisms exchange gases with their environment.
Subprocesses:
Ventilation: exchange of air into the respiratory organ
Inhalation
exhalation
External respiration : gas exchange between air and blood by diffusion
internal respiration: gas…
The alimentary canal has 3 parts:
Foregut: oral cavity, pharynx, esophagus, stomach
Midgut: small intestine
Hindgut: large intestine – caecum, colon, rectum
Humans are heterotrophic omnivores. -> gut processes many kinds of food
Enzymes:
cleave the chemical bonds of macromolecules…
Nutrition: The process by which living organisms obtain food necessary for metabolism.
The stages of nutrition are ingestion of nutrients, digestion, absorption and the elimination of wastes.
Nutrient: materials needed to maintain life functions
Nutriment (food) = nutrients + indigestible…
Skeletal muscles:
make up nearly half the body weight of an adult
contraction: need E + O2 -> rich blood supply
functions: active movement, heat generation, stores glycogen
Structure:
cells = muscle fibres:
long, have many nuclei
contain myofibrils – contractile…
I. Types of bones
a) long bones
E.g.: femur, tibia, fibula, humerus, radius, ulna
b) flat bones
E.g.: scapula bones of the skull
II. Structure of bones
cartilage
at the end of long…
Human Locomotion System
Main parts of the human locomotion system:
skeletal system (bony endoskeleton) -> passive
muscular system (skeletal muscles) -> active
Functions of vertebrate skeleton:
supports – framework for the body
movement – skeletal muscles attach to it
protects…
My power point presentation about the structure and function of the skin
50 incredible facts about your skin
Quizlet flashcards about the human skin
Learningapps labelling task
Learningapps matching task - Which layer of the skin do these statements refer to?
Experiments with your…
