Animal Systems Week 5 Lesson 2

Animal Systems Week 5 Lesson 2

Pages 56-61 , you may have two browser tabs open or use two devices

Time for a Hook video on digestion

Teacher will play the video on digestion

Time for quick lab observation on digestion

• materials needed : zip lock bag, orange juice, stocking, a bowl, 2 paper or plastic cups, crackers and water

• stockings and cups will represent the intestines

• Prediction/Hypothesis 1: The cup represents the big intestine, and the stocking the small intestine

• Prediction/Hypothesis 2 : the stocking would best represent the small intestine and the cups would best represent the big intestine

• TIME TO WATCH THE LAB OBSERVATION

Multiple Choice

which prediction or Hypothesis is more accurate?

• Prediction 1

• prediction 2

Digestion and excretion

_{-living things need to eat , and use energy from food.}

_{-plants make their own food through photosynthesis}

_{-most organisms have a way of ingesting or eating their food, and some absorb food from the environment}

_{-a cow gets energy by eating grass, humans may eat bread and some animals absorbs their food for energy}

ingestion and digestion

digestion is the first step to releasing the foods stored energy after ingestion.

-digestion is the process where food is broken down into absorbable molecules that can be used throughout the body.

-excretion is the removal of waste from the body, it has no value and can be toxic to cells and tissues

Multiple Select

choose the correct boxes

• we need food for energy

• excretion and digestion are the same

• excretion is the removal of waste from the body, it has no value and can be toxic to cells and tissues

• most organisms have a way of ingesting or eating their food, and some absorb food from the environment

_{comparing digestive systems}

_{-Invertebrates have several ways to digest and excrete}

_{-sponges are filter feeders, the food gets strained in their pores from the water}

_{-cnidarians and flatworms food enters and leaves from the same opening special cells digest and distribute nutrients, unused material is the released. more advanced invertebrates have two tubes 1 for ingestion and 1 for excretion(earth worm)}

Video time

Digestion in earth worms

vertebrates digestion

_{-animals have more complex digestive systems. They have many different digestive structures to handle their diet, eg plant eaters grind their food with their teeth and have bacteria in the gut that digests the plant tissue. Human digestion begins in the mouth, stomach, small intestine Nutrients are absorbed in the small intestine and moved into the blood. solid waste is the sent out the body kidneys, lungs skin and liver help get rid of waste}

Multiple Select

select the correct boxes

• animals have more complex digestive systems.

• more advanced invertebrates have two tubes 1 for ingestion and 1 for excretion(earth worm)

• Human digestion begins in the stomach

• sponges are filter feeders, the food gets strained in their pores from the water

• Nutrients are absorbed in the small intestine and moved into the blood

respiration

• respiration is process of releasing energy from food molecules

• all organisms undergo respiration to release energy from food

• respiration is also referred to as breathing, breathing provides oxygen to unlock the energy in food, exhaling rids the body of waste produced during cellular respiration CO2 and H2O is produced

• lungs are the organism of the respiratory system

Respiration

_{-soft bodied invertebrates used diffusion for respiration diffusion is a simple gas exchange , from High concentration pressure to low pressure for oxygen to diffuse, the surface need to be moist, worms, snails and slugs tend to stay in moist places-larger organisms need a more complex system that achieves the same result-mollusks, crustaceans and some worms have feathery structures . close to the surface, gas exchange happens here.-book lungs are plate structures stacked, insects and spider have branches called tracheas a network to reach oxygen rich air}

Multiple Select

select the correct boxes

• respiration is process of releasing energy from food molecules

• respiration happens at night only

• respiration is also referred to as breathing, breathing provides oxygen to unlock the energy in food, exhaling rids the body of waste produced during cellular respiration CO2 and H2O is produced

• soft bodied invertebrates used diffusion for respiration diffusion is a simple gas exchange

video time

watch Gas exchange video

verterbrates

_{amphibian means both, t live in water when young and land as adults.Young Amphibeans exchange gases through their skin & gills.Adults use th lungs and skin.}

_{3 vertebrate classes use lungs, reptiles, birds and mammals .In humans air enters the nose & mouth, passes into the pharynx then larynx and trachea. Air moves into branched bronchi, bronchioles branch from bronchi, gas exchange happens in tiny air saces called alveoli. Diaphragm contracts and expands to control breathing}

Multiple Choice

select the correct box

• Diaphragm contracts and expands to control breathing

• diaphragm deflates always

Multiple Select

select the correct boxes

• 3 vertebrate classes use lungs, reptiles, birds and mammals

• Young Amphibeans exchange gases through their skin & gills.Adults use th lungs and skin.

• we breath in CO2 and exhale O2 as humans

• In humans air enters the nose & mouth first