Respiratory Systems in Invertebrates

The video explains how different invertebrates, such as annelids and insects, have adapted to exchange gases with their environment. Annelids like earthworms use cutaneous respiration, where gases diffuse through their moist skin. Insects like cockroaches have a tracheal system, consisting of spiracles and tracheae, to transport oxygen directly to tissues. These adaptations allow efficient gas exchange without specialized respiratory organs.

What is the primary method of gas exchange in most invertebrates?

• Osmosis

• Diffusion

• Active transport

• Filtration

In earthworms, what is the process called where oxygen and carbon dioxide are exchanged across the skin?

• Tracheal respiration

• Cutaneous respiration

• Pulmonary respiration

• Branchial respiration

Why is the skin of an earthworm moist and slimy?

• To protect against predators

• To absorb nutrients

• To facilitate cutaneous respiration

• To help in movement

What is the role of blood capillaries in the respiration of earthworms?

• To produce mucus

• To store oxygen

• To carry oxygen to body cells and remove carbon dioxide

• To transport oxygen to the skin

What is the primary respiratory structure in cockroaches?

• Gills

• Trachea

• Skin

• Lungs

How does air enter the tracheal system of a cockroach?

• Through the skin

• Through spiracles

• Through the mouth

• Through the antennae

What are spiracles in the respiratory system of cockroaches?

• Blood vessels

• Respiratory muscles

• Openings in the exoskeleton

• Small air sacs

What is the function of tracheoles in the tracheal system of cockroaches?

• To transport blood

• To store food

• To produce enzymes

• To transport gases throughout the body

What happens to carbon dioxide produced by the cells in cockroaches?

• It is absorbed by the blood

• It diffuses into the tracheal tubes and exits through spiracles

• It is converted to oxygen

• It is stored in the body

What is a common feature of respiratory adaptations in annelids and arthropods?

• Both have a diaphragm

• Both bring the external environment close to the internal fluid

• Both use gills

• Both have lungs