Animal Systems

The __________ system produces hormones.

• excretory

• muscular

• nervous

• endocrine

A closed circulatory system is one in which

• Blood spreads freely throughout the body's tissues

• Blood travels through a system of blood vessels that extend throughout the body

• Blood travels through blood vessels into spongy cavities called sinuses

• Blood travels through a system of blood vessels and air sacs

Aquatic animals that strain plants and animals from the water that they live in are:

• Parasites

• Herbivores

• Detritus Feeders

• Filter Feeders

A lion that has sharp, pointed canines are best suited for:

• Tearing meat

• Filtering plankton

• GRinding leaves

• Cracking seeds

Which of the following groups of animals has the most efficient gas exchange?

• Mammals

• Amphibians

• Reptiles

• Birds

During this type of symbiosis, an organism lives within or on a host organism where they feed on tissues or blood and other bodily fluid

• Commensalism

• Parasitism

• Mutualism

During this type of symbiosis, both organisms benefit

• Commensalism

• Parasitism

• Mutualism

Oxygen constantly diffuses from air or water into an animal's bloodstream. For this to happen, the concentration of oxygen in the blood must be

• Greater than the concentration of oxygen in the air or water

• Greater than the concentration of carbon dioxide in the air or water

• Lower than the concentration of oxygen in the air or water

• Lower than the concentration of carbon dioxide in the air or water

Reptiles and amphibians have _ chambers in the heart.

• 4

• 3

• 2

• 1

Which system in animals is responsible for transporting nutrients, gases, and waste products throughout the body?

• Digestive system

• Respiratory system

• Circulatory system

• Nervous system