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World Health Organization (WHO), 317 Wort, 385

Wounds, disease transmission through, 307 *

Xanthophyceae, 334-35 Xanthophylls, 125, 343 Xenorhabdus nematophilus, 543 Xerophytes, 491 Xerosere, 498-99 Xylem, 56, 58, 59 components, 58, 59 in conifers, 424 in herbaceous dicotyledonous stems, 91-92 in leaves, 115, 118 in monocotyledonous stems, 97,

99-100 primary, 68, 69, 71, 88, 90 in Psilotum, 398 ray, 93, 95 in roots, 68, 69, 71 secondary, 90, 91, 92 in seedless vascular plants, 406 in steles, 90-91 water movement, 157, 160,

161, 164 in woody dicotyledonous stems,

Yarrow, 480

Yeast, 30, 360-61, 362, 363 Yellow-green algae, 334-35 Yellowstone National Park (Idaho,

Montana, Wyoming), cyanobac-terium in hot springs, 311 Yews, 113, 426-27, 435-36 English, 436 Pacific, 436 Yosemite National Park (California), creation, 503

Zea mays, 39, 99 Zebrina, 163 Zinc, 82

Zonation, 513, 515 Zoospores in algae, 330, 331, 332, 335 in fungi, 357 in slime molds, 351 Zosterophyllum, 398 Z (oxidation-reduction system), 180 Zygomycota, 358-60 Zygosporangium, 358-59, 360 Zygotes, 222, 226, 228

334, 339 aneuploid, 239 in angiosperms, 444, 447 in bryophytes, 386, 390, 391 in fungi, 358

in gymnosperms, 426, 427 polyploid, 239-40, 241 in seedless vascular plants, 398,

Glossary

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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