Human Body Systems: Digestion, Respiration, Circulation
The Digestive System
The digestive system is responsible for transforming food into simpler substances that can be used by the cells. It is made up of the digestive tract and digestive glands.
Digestive functions:
- Ingestion
- Digestion
- Absorption
- Egestion
Chewing is a mechanical action by which food is shredded. Insalivation is the process of wrapping food in saliva.
The Respiratory System
The respiratory system is responsible for taking oxygen from the air outside, taking it to the blood, and removing carbon
Read MorePulmonary and Plant Respiration: A Detailed Analysis
Pulmonary Respiration
In pulmonary respiration, gas exchange takes place in specialized cavities with highly vascularized, thin walls called lungs. These cavities are connected to the outside through:
- Nostrils: Where air is heated and cleaned of impurities.
- Pharynx: Connects the nasal passages, mouth, and throat.
- Larynx: Reinforced by cartilage and contains the vocal cords.
- Trachea: A tube reinforced with cartilaginous rings, serving as a cleaning area, which bifurcates into the bronchi.
- Bronchi, Bronchioles,
Animal and Plant Nutrition: Processes and Adaptations
Nutrition
Nutrition describes the processes by which living things take in external substances and turn them into matter and energy.
Autotrophs
Autotrophs produce their own organic matter from inorganic substances taken from the environment. They can be:
- Photosynthetic: Obtain energy from sunlight.
- Chemosynthetic: Obtain energy from chemical reactions.
Heterotrophs
Heterotrophs feed on other organisms or their remains. They can be carnivores, herbivores, omnivores, filter feeders, scavengers, etc.
Processes
Read MorePhysiological Metrics and Brand Impact on Consumer Behavior
Physiological Metrics in Marketing
1. Electrodermal Activity (EDA)
Electrodermal Activity measures how well electricity passes through the skin, influenced by sweat from the autonomic nervous system (ANS). More sweat equals better electricity flow. This indicates arousal or stimulation (fight-or-flight response), but not specific emotions (valence). Devices like wristbands or sensors are commonly used.
Example in Marketing: When testing a new ad, if EDA spikes during an exciting scene, it shows that
Read MoreHuman Respiration and the Circulatory System
Respiration
Respiration is the process by which air containing oxygen enters our body, and air rich in carbon dioxide is expelled. A living being can survive for several hours without eating, sleeping, or drinking water, but cannot stop breathing for more than three minutes. This fact highlights the importance of breathing for our lives.
Composition of Air
- Nitrogen (N2): 78.084%
- Oxygen (O2): 20.946%
- Argon (Ar): 0.9340%
- Carbon dioxide (CO2): 0.039%
- Neon (Ne): 0.001818%
- Helium (He): 0.000524%
- Inter alia