Science Lesson 1 and 2

Name 4 organ systems.

1. Digestive system 2. Circulatory system 3. Reproductive system 4. Muscular systems

Name 3 kinds of animal tissue

1. Muscle tissue 2. Nervous tissue 3. Connective tissue

Animal relationships are determined by what three things?

1. animal's body structure 2. the way the animal develops 3. DNA

Name 3 types of symmetry.

1. asymmetrical 2. radial symmetry 3. bilateral symmetry

Biologists have classified animals into how many major groups?

35

Animals within each phylum have uniquely organized body structures. This organization is called WHAT?

A body plan.

What is the basic unit of structure in bone tissue?

A bone cell.

What is DNA?

A chemical in cells that controls an organism's inherited characteristics.

How are animals classified?

According to how they are related to other animals.

Define bilateral symmetry.

Bilateral symmetry is when only ONE line can be drawn to divide it into halves that are MIRROR images.

The organization of an animal's cells into higher levels of structure, including tissues, organs, and organ systems, helps to describe an animal's WHAT?

Body plan.

Name two animals with bilateral symmetry.

Butterfly and a crab.

Bones and blood are examples of what kinds of tissues?

Connective tissues

What chemical in cells controls an organism's inherited characteristics?

DNA

Does bilateral symmetry animals complex organ systems help them function efficiently or non efficiently.

Efficiently.

TRUE or FALSE: Most animals with radial symmetry live in water.

FALSE. ALL animals with radial symmetry live in water.

TRUE or FALSE: Generally, animals with bilateral symmetry are smaller and more complex than animals with radial symmetry.

FALSE. Animals with bilateral symmetry are LARGER and more complex than animals with symmetry.

Name some animals that are vertebrates?

Fishes Amphibians Reptiles Birds Mammals

Where are most of an animal's specialized sense organs?

In his head. Such as his eyes.

Where is a concentration of nervous tissue found in an animal with bilateral symmetry?

In its head.

What do you call animals without a backbone?

Invertebrates

Name an animal with radial symmetry.

Jellyfish

What does nervous tissue do for a bilateral symmetry animal?

Nervous tissue processes information for the animal and coordinates the animal's responses.

Groups of organs make up WHAT?

Organ systems

Define radial symmetry.

Radial symmetry is when you can draw MANY imaginary lines through a central point to divide it into two MIRROR images.

Name some animals that are invertebrates?

Sponges Cnidarians Flatworms Segmented Worms Mollusks Roundworms Arthropods Ecinoderms

Most animals with bilateral symmetry have streamlined bodies. Having streamlined bodies help them how?

Streamlined bodies help them move quickly.

TRUE or FALSE: Most animals with bilateral symmetry have heads at their front ends.

TRUE

TRUE or FALSE: Most animals with radial symmetry do not have front or back ends and they do not have heads with specialized sense organs.

TRUE. Radial symmetry allows them to take in information about their surroundings from all directions. This is an advantage for animals that usually move slowly.

What are the main functions of an animal?

The main functions of an animal is to: -obtain food and oxygen, -keep internal conditions stable, -move in some way -reproduce.

What is an adaptation for reproduction for a kangaroo?

The pouch

What do you a call a group of similar cells that performs a specific function?

Tissue

An organ is made up of different WHAT?

Tissue. For ex: the leg bone of a frog is an organ composed of bone tissue, nervous tissue and blood.

True or False: An organ performs more complex functions than the tissues that make it up could perform alone.

True.

What do you call animals with a backbone?

Vertebrates

Structures and behaviorsthat allow animals to perform their functions are called WHAT?

adaptations

Keeping internal body conditions stable is called WHAT?

homeostasis

Animals with radial symmetry have complex body plans with tissues and usually with WHAT?

organ systems

WHAT ADAPTATIONS allow animals to obtain food and move?

teeth and limbs

The bodies of animals without symmetry are organized with some specialized cells but no WHAT?

tissues