Week 5 Lesson 3

Week 5 Lesson 3

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lesson is taken from textbook pages 62-67

first up a video on circulatory systems

What is Circulation?

digestion assist by providing glucose to cells,and respiration provides O2, which converts O2 into energy.

multi-cellular organisms circulation is the movement of material such as O2, glucose and waste throughout the body

inverterbrates either have an open or closed circulatory system.

open system blood is not entirely closed within blood vessels, instead blood is released directly into into the tissue.closed system blood remains in vessel, materials diffuse in and out of the thin vessel walls. valves keep blood flowing in one direction

organisms and their circulation

• different organisms use different ways to circulate O2 and glucose

• Waste material gets circulated too in the circulatory system, CO2

Multiple Select

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• The movement of important materials throughout the

  body is called

  circulation

• valves prevent blood flowing backward, and keeps blood flowing in one direction

• circulation is the digestion of food

• In a single-loop circulatory system, blood travels from

  the heart to the

  gills , then to the

  body cells. Then the blood goes back to the heart

Video time

body temperature warm blooded and cold blooded

_{Body temperature}

_{Activities in the body require a certain temperature to carry it out.some animals temperature changes with their surroundings.snakes seek the sun for warmth and burrow under rocks to cool down.amphibians, reptiles and most fish are cold blooded.Mammals are warm blooded surroundings do not influence their temperature. various body mechanisms, If they get hot they give of heat by perspiring. insulation in the body , a layer of fat called blubber. to prevent heat leaving their bodies in whales}

Multiple Select

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• Amphibians, reptiles, and

  most fish are cold-blooded animals.

• animals can change from being warm blooded to a cold blooded animal/organism

• Mammals and birds are warm-blooded. Their

  body temperature stays the same, even when the

  temperature of the air changes.

• warm-blooded animals can perspire to reduce the heat in the their body and cool it down (perspiration)

Time for a video

Types of skeletons

what are support and movement

animals need to move to survive.the animal kingdom has 3 systems of movement.Cnidarians , Mollusks, roundworms and som flat-worms have hydrostatic skeletons.it has no bones, a fluid filled cavity with muscle fibers.Muscles contract, cavity wall pushes against the fluid and produces motion

Exoskeleton

exoskeleton- a hard coating on the outside of the body.Arthropods and many mollusks have an exo. muscles attached on the inside of the skeleton help the arthropods move their joints

Multiple Select

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• Cnidarians, some flatworms,

  roundworms, and some mollusks

  have hydrostatic skeletons.

• birds have an exoskeleton

• An exoskeleton is a hard coating on

  the outside of the body.

• arthropods have an endoskeleton

endoskeleton

some sponges, echinoderms and vertebrtes, have endoskeletons. Made of a hard structure within the body.Except sponges which have no muscles.animals with endoskeletons have muscles attached to individual bones. skeletons help with movement and protection. Arthropods covering protects their internal organs.Internal ribs protect vital organs such as lungsand heart. the backbone brotects the nerve of the spinal cord

Multiple Select

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• Skeletons also provide protection.

• A vertebrate’s backbone

  protects the nerves of its spinal cord

• endo-skeleton is made of chitin

• vertebrates have endoskeletons

Lesson review on page 65

Students can do this on their own after the lesson

Multiple Select

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• The process by which

  organisms break down ingested food

  into a usable form is called ingestion

• Respiration releases

  energy from food

  molecules in the

  presence of oxygen.

• The movement of materials

  throughout the body is called digestion.

• Excretion

  removes wastes from

  the body.

• Insects have an exo-skeleton

video time

Quick lab on vein valves page 63

Multiple Select

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• valves are important

• valves allow for blood to flow in two directions

• valves are not needed in the body

• valves allow blood to flow in 1 direction

• blood is needed to transport oxygen and glucose and take waste throughout the body

video time

Quick lab/ video on vessels and bell jar pages66-67

different blood vessels

• consider, what would happen if I increase or decrease the diameter of the pipes
• Will the blood/water flow faster or slower

Open Ended

write your hypothesis, If the diameter of a blood vessel is made smaller,

then the flow of blood will....

Multiple Select

select the correct boxes

• Amphibians, reptiles, and

  most fish are cold-blooded animals.

• animals can change from being warm blooded to a cold blooded animal/organism

• Mammals and birds are warm-blooded. Their

  body temperature stays the same, even when the

  temperature of the air changes.

• w

from the bell jar experiment

possible hypothesis : Student speaks

Open Ended

hypothesis : if humans have lungs,

then the human body must also have the

following parts for the lungs to work:

Open Ended

what experiment would you use to test your hypothesis? explain what is needed and the steps