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Concept explainers
Introduction:
Synovial joints are movable joints and is the most commonly found joints in the human body. It is also called as diarthrosis. The synovial joint constitutes a synovial cavity filled with synovial fluid. The articulating bone surfaces have an articular cartilage that allows smooth mobility of the bones.
Synovial joints have various axis of rotation. The axis of rotation is an imaginary line that projects through the pivot in a joint. Movements around an axis of rotation can occur in either sagittal, frontal, or transverse plane of motion.
The rotation of joints is classified into: (i) Uniaxial joints which rotates in one axis and one plane. It allows forward-backward movement in the sagittal plane; (ii) Biaxial joints can rotate in two axes and in two planes. It allows side-to-side movement in the frontal plane and forward-backward movement in the sagittal plane; (iii) Multiaxial joints rotate in three axes and three planes. It allows forward-backward movement in the sagittal plane, side-to-side movement in the frontal plane and internal-external rotation in the transverse plane.
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Chapter 9 Solutions
Anatomy & Physiology: The Unity of Form and Function
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forward
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
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