Animal Systems

The organ system that breaks down food so it can be absorbed into the bloodstream.

• nervous system

• digestive system

• skeletal system

• respiratory system

Which animal can breathe through their skin?

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Lungs are to horses as ...

• ... wings are to birds

• ... teeth are to rabbits

• ... mouths are to grasshoppers

• ... gills are to fish

Which shows the correct path oxygen flows through our body?

• mouth → blood → cells → lungs

• mouth → lungs → blood → cells

• cells → blood → lungs → mouth

• blood → cells → mouth → lungs

Which is NOT a respiratory structure found in animals?

• Lungs

• Gills

• Skin

• Fur

How do axolotls obtain oxygen?

• Their gills absorb it from the water.

• They take it in when they breathe the air.

• Their eyes absorb it from the water.

• Axolotls do not need oxygen.

Animals that live in the water usually have gills, however, some have lungs and can hold their breath for a long time. SELECT ALL examples of water animals that have lungs.

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mixes and churns food while it is being broken down by acids and enzymes

• Small Intestine
• Stomach
• Pancreas
• Esophagus

The primary function of the small intestine is:

• nutrient absorption
• water absorption
• waste secretion
• vitamin conversion

Cows are a:

• Monogastric
• Ruminant
• Pseudo Ruminant
• Avian