Visible near the top of this tube are two sperm nuclei - one of which is destined to unite with the egg to form the embryo - the other will fuse with the polar nuclei to become the endosperm tissue which will nourish the developing embryo.
. Lumbar Vertebrae Set (L1 through L5) - Natural ToneAll five lumbar vertebrae (L1 through L5) loosely strung in sequence on high-test line.Vertebrae can be easily unstrung and restrung.
Your choice of left or right appendicular components so you can replenish the missing pieces of your sets with corresponding parts.. Replace lost and damaged bones with Premier medical-quality specimens - the cost-effective way to breathe new life into broken-down bone sets.
The other will fertilize the egg to form the diploid zygote. One sperm is destined to fertilize the two polar nuclei forming the nutritive triploid endosperm. One of them has generated a pollen tube which has penetrated the micropyle.) Anatomical Model, Giant Dicot Flower Model.
Our Flexible Series Skeletons incorporate our detachable 4-part skull with individual extractable/reinsertable teeth, flexible spinal column, resilient spinal cord with medulla, paired spinal nerve roots, cervical vertebral arteries, herniated lumbar disc between L4 and L5, detachable sacral flap which exposes the branching of the cauda equina, and detachable upper and lower extremities.
Loosely strung with detachable high-test line. Anatomical Model, Representative Vert Set of Five Natural.This set includes a blackline master of the Spinal Column #8210 for self testing or can be used as a classroom activityIncludes: Atlas, Axis, and typical cervical, thoracic and lumbar vertebrae all natural tone.
Printed on tear-proof, non-yellowing synthetic stock..Easy to understand text printed beside each illustration. This popular series is suitable for age levels from adolescence to adult, treating significant themes in an appealing and understandable manner.
.Separate figures detail the heart and habit studies which include an enlarged glochidium and numerous glochidia attached to a fish. The anatomy of this common mollusk is portrayed in a complete dissection.
Separate views include the female abdomen with eggs and young, the heart, and the modified appendages which comprise the mouthparts. 44 x 36 inches Charts/Posters, Crayfish Chart Mounted.
Anatomical Model, Giant Kidney Model Glomeruli (renal corpuscles) 14. Illustrated in deep relief are:the renal artery and veina portion of the ureter, cortexmedullapyramidspelvismajor and minor calycesinternal blood supplyNephrons are detailed in contrasting colors with the distal and proximal convoluted tubules somewhat simplified for clarity. Arcuate arteries33. Excretory tubules25.
. Plant mitosis is a part of plant cell division where the replicated chromosomes are separated into two, daughter nuclei.It occurs in four stages, same as animal mitosis. During prophase, the chromatin is condensed into individual chromosomes.
36x44 Set includes the following:The Flower and Pollination: Exemplifying a complete flower with all parts identified, the orange blossom illustrates the reproductive function of flowers.Parts of a Plant: Employing the bean as a representative flowering plant, this chart identifies the five principal parts of a plant while explaining the task each part performs.Plant Growth: The life cycles of the bean (a dicot) and corn (a monocot) are compared and contrasted from seed germination and growth stages through the formation of the fruit. Supplementary figures depict other flower types and at the same time illustrate 4 methods of pollination.