Understanding Human Diseases: Types, Defenses, and Treatments
Noninfectious Diseases
These diseases affect the body’s organ systems. They can be categorized as:
- Inherited or Genetic Diseases: Passed down from parents, often chronic (e.g., diabetes, hemophilia).
- Mental Diseases: Cause abnormal personality disorders (e.g., neurosis, schizophrenia). Treatment may involve psychotropic drugs, therapy, and support.
- Specific Organ/System Diseases: Affect particular organs or body systems, such as the digestive, circulatory, nervous, musculoskeletal, endocrine, or sensory
Human Biology: Systems and Processes
Exam 2 Review
Chapter 8: Circulatory System
Arteries and Veins
Arteries carry blood away from the heart, usually carrying deoxygenated blood (except for the pulmonary artery). The largest artery is the aorta.
Veins carry blood towards the heart, usually carrying deoxygenated blood (except for the pulmonary vein). The largest vein is the vena cava.
Blood Flow Path
- Superior Vena Cava: Blood enters the heart from the upper body.
- Right Atrium: Blood flows into the right atrium.
- Tricuspid Valve: Blood passes
Biotechnology and Recombinant DNA Technology: Techniques and Applications
Biotechnology
For thousands of years, humankind has used microbial fermentation processes to obtain useful products. Modern biotechnology implies the deliberate manipulation of the genetic material of living organisms to make or modify a product, improve animals or plants, or develop microorganisms with specific skills for specific uses. The process of modern biotechnology requires understanding the mechanisms governing the decoding and expression of the information contained in genes and the development
Read MorePlant Classification, Structure, and Ecology
Plant Classification
Plants are classified into three main groups:
- Bryophyta (mosses and liverworts): These inhabit moist environments and depend on water for reproduction. They do not produce flowers or seeds.
- Pteridophyta (ferns and horsetails): These have independent vessels for water transport. Their leaves and roots, known as fronds, contain spores involved in asexual reproduction. They do not produce fruits or seeds.
- Spermatophyta (seed-producing plants): This group includes all flowering plants
Human Circulatory System: Heart, Blood Flow, and Pressure
Introduction
The basic function of the circulatory system is to transport nutrients and oxygen to cells and remove metabolic waste. The heart, a muscular pump, propels blood throughout the body. The circulatory system is divided into two main circuits: pulmonary circulation (heart-lungs-heart) and systemic circulation (heart-body-heart). Arteries carry blood away from the heart, and veins carry blood back to the heart, regardless of oxygen content.
Heart
The heart, located in the mediastinum, is protected
Read MoreCellular Biology: Exploring Organelles and Cell Cycle
Chloroplasts
Chloroplasts are cellular organelles found in eukaryotic photosynthetic organisms. They are essential for photosynthesis. Enclosed by a double membrane, chloroplasts contain thylakoids, vesicles where pigments and other molecules convert light energy into chemical energy. Chlorophyll, the primary pigment, is mainly located within chloroplasts. Key Features: Responsible for the light and dark phases of photosynthesis. Involved in the biosynthesis of fatty acids from carbohydrates and
Read More