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Human Anatomy & Physiology (11th Edition)
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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Plant bio

594 Upper epidermis CHAPTER 25 Lower epidermis Xylem Lower epidermis Collenchyma Bundle sheath Stoma Phloem The Shoot: Primary Structure and Development Collenchyma (a) Palisade parenchyma Trichome (b) Phloem Xylem Spongy parenchyma Stoma 100 μm Upper epidermis 50 μm 25-21 Sections of a lilac (Syringa vulgaris) leaf (a) A transverse section through a midrib showing the midvein. (b) A transverse section through a portion of the blade. Two small veins (minor veins) can be seen in this view. (c) A "paradermal" section of the leaf. Strictly speaking, a paradermal section is one cut parallel to the epidermis. In practice, such sections are more or less oblique and extend from the upper to the lower epidermis. Thus, part of the upper epidermis can be seen in the light area at the top of this micrograph, and part of the lower epidermis at the bottom. Notice the greater number of stomata in the lower epidermis, as evidenced by the number of red-stained guard cells. (The few darkly stained spots are trichomes, or epidermal hairs.) The venation in lilac is netted. (d) Enlargement of a portion of the section in (c), showing palisade parenchyma and spongy parenchyma with a vein ending, sectioned through some tracheary elements and surrounded by a bundle sheath. (e) This enlargement (at the top of the facing page) shows a portion of the lower epidermis with two trichomes and several stomata. on Lower epidermis Bundle sheath Spongy parenchyma Upper epidermis (c) Tracheary elements (d) 500 μm Palisade parenchyma 38 50 μm
Transcribed Image Text:594 Upper epidermis CHAPTER 25 Lower epidermis Xylem Lower epidermis Collenchyma Bundle sheath Stoma Phloem The Shoot: Primary Structure and Development Collenchyma (a) Palisade parenchyma Trichome (b) Phloem Xylem Spongy parenchyma Stoma 100 μm Upper epidermis 50 μm 25-21 Sections of a lilac (Syringa vulgaris) leaf (a) A transverse section through a midrib showing the midvein. (b) A transverse section through a portion of the blade. Two small veins (minor veins) can be seen in this view. (c) A "paradermal" section of the leaf. Strictly speaking, a paradermal section is one cut parallel to the epidermis. In practice, such sections are more or less oblique and extend from the upper to the lower epidermis. Thus, part of the upper epidermis can be seen in the light area at the top of this micrograph, and part of the lower epidermis at the bottom. Notice the greater number of stomata in the lower epidermis, as evidenced by the number of red-stained guard cells. (The few darkly stained spots are trichomes, or epidermal hairs.) The venation in lilac is netted. (d) Enlargement of a portion of the section in (c), showing palisade parenchyma and spongy parenchyma with a vein ending, sectioned through some tracheary elements and surrounded by a bundle sheath. (e) This enlargement (at the top of the facing page) shows a portion of the lower epidermis with two trichomes and several stomata. on Lower epidermis Bundle sheath Spongy parenchyma Upper epidermis (c) Tracheary elements (d) 500 μm Palisade parenchyma 38 50 μm
IV. Leaves A. SLIDE: Syringa - leaf xs (Text p. 594) 1. Draw and label: mesophyll, epidermis, air spaces, stoma 2. Propose a function for each tissue above. What type of tissue would you expect mesophyll to be? 3. Kalanchoe - Mother of Thousands -What type of reproduction is occurring that allows this plant to produce all of the plantlets along the leaf margin?
Transcribed Image Text:IV. Leaves A. SLIDE: Syringa - leaf xs (Text p. 594) 1. Draw and label: mesophyll, epidermis, air spaces, stoma 2. Propose a function for each tissue above. What type of tissue would you expect mesophyll to be? 3. Kalanchoe - Mother of Thousands -What type of reproduction is occurring that allows this plant to produce all of the plantlets along the leaf margin?
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