Levels of Organization
• CELLS
• TISSUES – EPITHELIAL TISSUE – CONNECTIVE TISSUE – MUSCLE TISSUE – NERVE TISSUE
Levels of Organization (detailed)
• Chemical Level
- atoms & molecule
• Cellular Level
- cells
• Tissue Level
- Epithelial tissue
• Organ Level
- small intestine
• Organ System Level
- liver, stomach, gallbladder, large intestine, small intestine
• Organismal Level
Cell
Organ Systems
Organ Systems
Integumentary System
Musculoskeletal System
Skeletal System
Nervous System
Endocrine System
Hypothalamus gland in the brain sends signal to the pituitary gland. Connects nervous system with endocrine system.
• HORMONES • GLANDS 1. PITUITARY 2. THYROID 3. PARATHYROID 4. ADRENAL 5. PINEAL 6. GONADS 7. PANCREAS 8. THYMUS
Circulatory System
• HEART • BLOOD VESSELS 1. ARTERIES 2. VEINS 3. CAPILLARIES
Circulation of the heart
Immune System
• BONE MARROW • LYMPH NODES • LYMPHOID ORGANS – THYMUS – SPLEEN – TONSILS • IMMUNE RELATED CELLS - WHITE BLOOD CELLS (WBC) - ANTIBODIES/ANTIGENS - T CELLS
Hematologic / Lymphatic System
• BLOOD (Hematologic)
- PLASMA
- FORMED ELEMENTS
- RBCs
- WBCs
- Clotting Factors (platelets)
• LYMPHATIC
– LYMPH FLUID
– LYMPH VESSELS
– LYMPH NODES
– LYMPHOID ORGANSRespiratory System
The pathway for air exchange
Upper respiratory tract: • NOSE • SINUSES • PHARYNX (throat) • LARYNX (voice box) • TRACHEA
Lower respiratory tract • BRONCHI • BRONCHIOLES • ALVEOLI • “LUNGS”
Digestive System
• MOUTH • TEETH • TONGUE • ESOPHAGUS • STOMACH • SMALL INTESTINE • LARGE INTESTINE – APPENDIX – CECUM – COLON (ascending, transverse, descending) – RECTUM – ANUS • ACCESORY ORGANS – LIVER – GALLBLADDER – PANCREAS – PERITONEUM
Urinary / Renal System (Genitourinary)
Reproductive System (Male)
Glands of reproduction are gonads; all are influenced by hormones
MALE • TESTES • DUCTAL SYSTEM • SCROTUM • PENIS • ACCESORY GLANDS
Reproductive System (Female)
Glands of reproduction are gonads; all are influenced by hormones
FEMALE • OVARIES • OVIDUCTS (fallopian tubes) • UTERUS • VAGINA • EXTERNAL GENITALIA • BREASTS