A bumblebee is any member of the bee genus Bombus‚ in the family Apidae. There are over 250 known species‚[1] existing primarily in the Northern Hemisphere although they also occur in South America. They have been introduced to New Zealand and the Australian state of Tasmania. Bumblebees are social insects that are characterised by black and yellow body hairs‚ often in bands. However‚ some species have orange or red on their bodies‚ or may be entirely black.[2] Another obvious (but not unique) characteristic
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Mastication is the action of chewing on food using the teeth‚ making it easy to be ingested by the body. It is known to be the first and foremost step of digestion as food can’t be swallowed effectively without it being turned into something that is easily consumable. For the jaw to be able to churn the food repeatedly‚ it requires muscles to adduct and abduct as well as give it strength to bite on hard food such as tooth-crackers. Muscles of mastication are known to be the most crucial muscles
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the cranium. frontal bone‚ 2 parietal bones‚ 2 temporal bones‚ occipital bone‚ sphenoid‚ ethmoid. B. What function do the cranial bones serve? To protect the sense organs and the brain C. List the bones that form the eye orbit. Zygomatic‚ maxilla‚ lacrimal‚ frontal bone‚ spenoid‚ ethmoid‚ and palatine D. Examine your skull model and describe some ways in which the mandible is different from the other bones of the skull. The shape of the bone is different. It is the only bone that is attached
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ABSTRACT Phylogenetic systematics is away to determine the relatedness between species by creating cladograms. In this study‚ we observed the difference between cladograms created with morphological traits and molecular DNA with respect to Felis cattus‚ Canis familiaris‚ Didelphis virginiana‚ Odocoileus virginianus‚ and the Equus caballus. The results demonstrated that although a species is similar or closely related in regards to morphological traits‚ it does not mean that their DNA composition
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occipital‚ 2 temporal‚ sphenoid‚ ethmoid B. What function do the cranial bones serve? To protect the sensory organs and the brain. C. List the bones that form the eye orbit. Zygomatic‚ maxilla‚ lacrimal‚ frontal‚ sphenoid‚ ethmoid and palatine. D. Examine the skull on the skeleton model and describe some ways in which the mandible is different from the other bones of the skull. The shape is different. It is attached
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INVESTIGATIONS INTO THE EVOLUTION OF AUSTRALIAN MAMMALS WITH A FOCUS ON MONOTREMATA Thesis submitted by ANNE MARIE MUSSER August 2005 For the Degree of Doctor of Philosophy in the School of Biological‚ Earth & Environmental Sciences University of New South Wales ABSTRACT This thesis began as an investigation into evolution of the platypus family (Ornithorhynchidae‚ Monotremata)‚ now known from both Australia and South America. The thesis broadened its scope with inclusion of non-ornithorhynchid
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EVOLUTION OF DENTAL IMPLANTS Since time immemorial‚ humans have used dental implants in one form or other to replace missing teeth. The first evidence of dental implants is attributed to the Mayan population roughly around 600 AD where they succeeded in utilizing pieces of shells as implants as a replacement for mandibular teeth. Radiographs taken in the 1970’s of Mayan mandibles show compact bone formation around the implants. Moreover‚ around 800 AD‚ a stone implant was first prepared and placed
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w/masseter muscle draws corner of lips laterally‚ tenses lips (synergist of zygomaticus) Levator labii superioris between obicularis oris zygomatic bone and opens lips; raises and furrows upper and inferior eye margin infraorbital margin of maxilla skin and muscle of upper lip lip Depressor labii inferioris running from mandible body of mandible lateral to to lower lip its midline draws lower lip inferiorly (as in a skin and muscle of lower lip pout) Depressor anguli oris lateral
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unbelievable occurred. On September 13th 1848 Gage and his men were working on the Rutland and Burlington Railroad located in Vermont when all of the sudden Gage had a 3ft 8in tamping iron go straight through his skull. The iron entered through his left maxilla and exited through the top of his skull to be recovered around 30 yards behind him. However‚ this did not kill Gage as he was up and walking within minutes of the accident and this is what makes this case so intriguing. This rare case of what many
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ABSTRACT Morphology is inherent to an understanding of how insects live and function. Orthopteroid insects are good choices for this study because gross morphological features are readily observed. Like most other insects‚ the grasshopper (or other Orthopteroid) consists of three general body regions: the head‚ thorax and abdomen. For morphological studies‚ antennae were detached from the specimen. Then‚ the antenna was mounted in a glass slide. The prepared slides were then examined under magnoscope
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