Animal Organs. SNC2P Biology

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1 Animal Organs SNC2P Biology

2 The Hierarchy of Structure Level 5 Organism (many different organ systems working together Level 4 System (one or more organs that work together to perform a body function) Level 3 Organ (structure made of two or more types of tissue that work together to do a specific task) Level 2 Tissue (group of similar cells that perform the same function) Level 1 Cell (the most basic unit of living things)

3 Organs Similar to cells that work together to form tissues, a group of tissues that work together to perform a complex task are known as organs. Organ Different tissues working together to perform a complex task

4 Animal Organs The Terminologia Anatomica (TA) states that there are over 7500 different named parts in the human body, many of which are organs. Among them we have: Skin Lungs Heart Stomach Intestines Are you able to think of any others?

Animal Organs - The Skin The skin is the largest organ in your body and is your first line of defense from external factors It is made up of two different layers; the epidermis and the

5 Animal Organs - The Skin The skin is the largest organ in your body and is your first line of defense from external factors It is made up of two different layers; the epidermis and the dermis Epidermis: The outer protective layer of the skin. Made up of epithelial tissue. Dermis: The inner layer of the skin. Made up of connective tissue, nerve tissue, and muscle tissue.

Animal Organs - The Lungs The lungs are a pair of organs that are involved in respiration. Your lungs allow you to breathe in oxygen and breathe out carbon dioxide.

6 Animal Organs - The Lungs The lungs are a pair of organs that are involved in respiration. Your lungs allow you to breathe in oxygen and breathe out carbon dioxide. The lungs are made of connective tissue and epithelial tissue. When you breathe, air passes through the pharynx, the trachea, the bronchus, and smaller bronchial tubes into tiny air sacs, called alveoli. These alveoli are surrounded by thin wall blood vessels called capillaries. Oxygen travels from the alveoli through the capillaries into the blood.

7 Animal Organs - The Heart The heart is a muscular pump that supplies blood to all parts of the body. An adult human heart is weighs about 300g In an average lifetime, the heart beats about 3.5 billion times The heart is divided into four chambers: the left and right atria, and the left and right ventricles.

8 Animal Organs - The Stomach When you eat, various organs assist with the digestive process. One of these organs is the stomach. The stomach is made of epithelial, connective, nervous, and muscle tissues. An adult human stomach can hold around 1.5 liters (nearly half a gallon) of food/drink. Food doesn t break down completely in the stomach. In fact, most of digestion happens in the small intestines.

9 Animal Organs - Intestines The intestines are an area of chemical digestion and removal of wastes. There are two intestines in the human body: the large intestine and the small intestine. Despite its name, the small intestine (30m2) has much more surface area than the large intestine (2m2). What does this tell you about the nutrient absorption of each intestine?

10 Humans vs. Other Animals All animals have organs to perform complex tasks. However, some animals have their organs arranged differently, lack certain organs, or have several of the same organ.

11 Humans vs. Other Animals For example, a frog s heart has three chambers, while a human s heart has four.

12 Humans vs. Other Animals Worms have five hearts while humans only have one

13 Humans vs. Other Animals A cow has four stomachs, while a human has only one.

14 Humans vs. Other Animals Fish have gills instead of lungs, which allow them to breathe underwater

15 Recap Similar to cells that work together to form tissues, a group of tissues that work together to perform a complex task are known as organs. Animal organs include the skin, stomach, lungs, and heart among many others. All animals have organs to perform complex tasks. However, some animals have their organs arranged differently, lack certain organs, or have several of the same organ.

Human Body Systems Study Guide

Human Body Systems Study Guide Nervous System 1. Brain stem part of nervous system and controls the heartbeat and breathing by controlling the cardiac muscle and diaphragm. Also receives information from