Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Is the students identification accurate? give 2 reasons
Transcribed Image Text:### Diagram: Euglena
The diagram provides a detailed illustration of a Euglena cell, highlighting its various components. Here is an explanation of the labeled parts:
- **Mitochondria**: Organelles responsible for energy production through cellular respiration.
- **Nucleolus**: A region within the nucleus involved in ribosomal RNA synthesis.
- **Nucleus**: The control center of the cell, containing genetic material (DNA).
- **Membrane**: A protective barrier that controls the movement of substances in and out of the cell.
- **Endoplasmic Reticulum**: A network involved in protein and lipid synthesis.
- **Chloroplast**: Organelles where photosynthesis occurs, allowing the Euglena to produce its own food.
- **Golgi Apparatus**: Involved in the modification, sorting, and packaging of proteins.
- **Contractile Vacuole**: A structure that expels excess water from the cell, maintaining osmotic balance.
- **Stigma (Eyespot)**: A pigmented area that helps the Euglena detect light, aiding in photosynthesis.
- **Photoreceptor**: Works in conjunction with the eyespot to help the organism sense light.
- **Flagellum**: A whip-like structure that enables movement, allowing the Euglena to navigate its environment.
This intricate diagram provides a comprehensive view of the Euglena's cellular structure, emphasizing its unique combination of plant and animal cell characteristics.
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In the living world, we see a large number of microorganisms, animals and plants. These organisms possess some unique characteristics in terms of morphology and behavior that distinguishes them from the others.
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